diff --git a/Penumbra/Api/ModsController.cs b/Penumbra/Api/ModsController.cs
index 3232931a..03cf6885 100644
--- a/Penumbra/Api/ModsController.cs
+++ b/Penumbra/Api/ModsController.cs
@@ -16,15 +16,15 @@ public class ModsController : WebApiController
     [Route( HttpVerbs.Get, "/mods" )]
     public object? GetMods()
     {
-        return Penumbra.CollectionManager.CurrentCollection.Cache?.AvailableMods.Values.Select( x => new
-            {
-                x.Settings.Enabled,
-                x.Settings.Priority,
-                x.Data.BasePath.Name,
-                x.Data.Meta,
-                BasePath = x.Data.BasePath.FullName,
-                Files    = x.Data.Resources.ModFiles.Select( fi => fi.FullName ),
-            } );
+        return Penumbra.ModManager.Mods.Zip( Penumbra.CollectionManager.Current.ActualSettings ).Select( x => new
+        {
+            x.Second?.Enabled,
+            x.Second?.Priority,
+            x.First.BasePath.Name,
+            x.First.Meta,
+            BasePath = x.First.BasePath.FullName,
+            Files    = x.First.Resources.ModFiles.Select( fi => fi.FullName ),
+        } );
     }
 
     [Route( HttpVerbs.Post, "/mods" )]
@@ -34,7 +34,7 @@ public class ModsController : WebApiController
     [Route( HttpVerbs.Get, "/files" )]
     public object GetFiles()
     {
-        return Penumbra.CollectionManager.CurrentCollection.Cache?.ResolvedFiles.ToDictionary(
+        return Penumbra.CollectionManager.Current.ResolvedFiles.ToDictionary(
                 o => o.Key.ToString(),
                 o => o.Value.FullName
             )
diff --git a/Penumbra/Api/PenumbraApi.cs b/Penumbra/Api/PenumbraApi.cs
index 540e1432..6a373d14 100644
--- a/Penumbra/Api/PenumbraApi.cs
+++ b/Penumbra/Api/PenumbraApi.cs
@@ -5,6 +5,7 @@ using System.Reflection;
 using Dalamud.Game.ClientState.Objects.Types;
 using Dalamud.Logging;
 using Lumina.Data;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
 using Penumbra.GameData.Enums;
 using Penumbra.Mods;
@@ -76,7 +77,7 @@ public class PenumbraApi : IDisposable, IPenumbraApi
         _penumbra!.ObjectReloader.RedrawAll( setting );
     }
 
-    private static string ResolvePath( string path, ModManager _, ModCollection collection )
+    private static string ResolvePath( string path, ModManager _, ModCollection2 collection )
     {
         if( !Penumbra.Config.EnableMods )
         {
@@ -84,24 +85,21 @@ public class PenumbraApi : IDisposable, IPenumbraApi
         }
 
         var gamePath = Utf8GamePath.FromString( path, out var p, true ) ? p : Utf8GamePath.Empty;
-        var ret      = collection.Cache?.ResolveSwappedOrReplacementPath( gamePath );
-        ret ??= Penumbra.CollectionManager.ForcedCollection.Cache?.ResolveSwappedOrReplacementPath( gamePath );
+        var ret      = collection.ResolvePath( gamePath );
         return ret?.ToString() ?? path;
     }
 
     public string ResolvePath( string path )
     {
         CheckInitialized();
-        return ResolvePath( path, Penumbra.ModManager, Penumbra.CollectionManager.DefaultCollection );
+        return ResolvePath( path, Penumbra.ModManager, Penumbra.CollectionManager.Default );
     }
 
     public string ResolvePath( string path, string characterName )
     {
         CheckInitialized();
         return ResolvePath( path, Penumbra.ModManager,
-            Penumbra.CollectionManager.CharacterCollection.TryGetValue( characterName, out var collection )
-                ? collection
-                : ModCollection.Empty );
+            Penumbra.CollectionManager.Character( characterName ) );
     }
 
     private T? GetFileIntern< T >( string resolvedPath ) where T : FileResource
@@ -136,12 +134,12 @@ public class PenumbraApi : IDisposable, IPenumbraApi
         {
             if( !Penumbra.CollectionManager.ByName( collectionName, out var collection ) )
             {
-                collection = ModCollection.Empty;
+                collection = ModCollection2.Empty;
             }
 
-            if( collection.Cache != null )
+            if( collection.HasCache )
             {
-                return collection.Cache.ChangedItems;
+                return collection.ChangedItems;
             }
 
             PluginLog.Warning( $"Collection {collectionName} does not exist or is not loaded." );
diff --git a/Penumbra/Collections/CollectionManager.Active.cs b/Penumbra/Collections/CollectionManager.Active.cs
new file mode 100644
index 00000000..3250e10d
--- /dev/null
+++ b/Penumbra/Collections/CollectionManager.Active.cs
@@ -0,0 +1,261 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Dalamud.Logging;
+using Penumbra.Meta.Manager;
+using Penumbra.Mod;
+using Penumbra.Mods;
+using Penumbra.Util;
+
+namespace Penumbra.Collections;
+
+public sealed partial class CollectionManager2
+{
+    // Is invoked after the collections actually changed.
+    public event CollectionChangeDelegate? CollectionChanged;
+
+    private int _currentIdx     = -1;
+    private int _defaultIdx     = -1;
+    private int _defaultNameIdx = 0;
+
+    public ModCollection2 Current
+        => this[ _currentIdx ];
+
+    public ModCollection2 Default
+        => this[ _defaultIdx ];
+
+    private readonly Dictionary< string, int > _character = new();
+
+    public ModCollection2 Character( string name )
+        => _character.TryGetValue( name, out var idx ) ? _collections[ idx ] : Default;
+
+    public bool HasCharacterCollections
+        => _character.Count > 0;
+
+    private void OnModChanged( ModChangeType type, int idx, ModData mod )
+    {
+        switch( type )
+        {
+            case ModChangeType.Added:
+                foreach( var collection in _collections )
+                {
+                    collection.AddMod( mod );
+                }
+
+                foreach( var collection in _collections.Where( c => c.HasCache && c[ ^1 ].Settings?.Enabled == true ) )
+                {
+                    collection.UpdateCache();
+                }
+
+                break;
+            case ModChangeType.Removed:
+                var list = new List< ModSettings? >( _collections.Count );
+                foreach( var collection in _collections )
+                {
+                    list.Add( collection[ idx ].Settings );
+                    collection.RemoveMod( mod, idx );
+                }
+
+                foreach( var (collection, _) in _collections.Zip( list ).Where( c => c.First.HasCache && c.Second?.Enabled == true ) )
+                {
+                    collection.UpdateCache();
+                }
+
+                break;
+            case ModChangeType.Changed:
+                foreach( var collection in _collections.Where(
+                            collection => collection.Settings[ idx ]?.FixInvalidSettings( mod.Meta ) ?? false ) )
+                {
+                    collection.Save();
+                }
+
+                foreach( var collection in _collections.Where( c => c.HasCache && c[ idx ].Settings?.Enabled == true ) )
+                {
+                    collection.UpdateCache();
+                }
+
+                break;
+            default: throw new ArgumentOutOfRangeException( nameof( type ), type, null );
+        }
+    }
+
+    private void CreateNecessaryCaches()
+    {
+        if( _defaultIdx >= 0 )
+        {
+            Default.CreateCache();
+        }
+
+        if( _currentIdx >= 0 )
+        {
+            Current.CreateCache();
+        }
+
+        foreach( var idx in _character.Values.Where( i => i >= 0 ) )
+        {
+            _collections[ idx ].CreateCache();
+        }
+    }
+
+    public void UpdateCaches()
+    {
+        foreach( var collection in _collections )
+        {
+            collection.UpdateCache();
+        }
+    }
+
+    private void RemoveCache( int idx )
+    {
+        if( idx != _defaultIdx && idx != _currentIdx && _character.All( kvp => kvp.Value != idx ) )
+        {
+            _collections[ idx ].ClearCache();
+        }
+    }
+
+    public void SetCollection( string name, CollectionType type, string? characterName = null )
+        => SetCollection( GetIndexForCollectionName( name ), type, characterName );
+
+    public void SetCollection( ModCollection2 collection, CollectionType type, string? characterName = null )
+        => SetCollection( GetIndexForCollectionName( collection.Name ), type, characterName );
+
+    public void SetCollection( int newIdx, CollectionType type, string? characterName = null )
+    {
+        var oldCollectionIdx = type switch
+        {
+            CollectionType.Default => _defaultIdx,
+            CollectionType.Current => _currentIdx,
+            CollectionType.Character => characterName?.Length > 0
+                ? _character.TryGetValue( characterName, out var c )
+                    ? c
+                    : _defaultIdx
+                : -2,
+            _ => -2,
+        };
+
+        if( oldCollectionIdx == -2 || newIdx == oldCollectionIdx )
+        {
+            return;
+        }
+
+        var newCollection = this[ newIdx ];
+        if( newIdx >= 0 )
+        {
+            newCollection.CreateCache();
+        }
+
+        RemoveCache( oldCollectionIdx );
+        switch( type )
+        {
+            case CollectionType.Default:
+                _defaultIdx                       = newIdx;
+                Penumbra.Config.DefaultCollection = newCollection.Name;
+                Penumbra.ResidentResources.Reload();
+                Default.SetFiles();
+                break;
+            case CollectionType.Current:
+                _currentIdx                       = newIdx;
+                Penumbra.Config.CurrentCollection = newCollection.Name;
+                break;
+            case CollectionType.Character:
+                _character[ characterName! ]                           = newIdx;
+                Penumbra.Config.CharacterCollections[ characterName! ] = newCollection.Name;
+                break;
+        }
+
+        CollectionChanged?.Invoke( this[ oldCollectionIdx ], newCollection, type, characterName );
+        Penumbra.Config.Save();
+    }
+
+    public bool CreateCharacterCollection( string characterName )
+    {
+        if( _character.ContainsKey( characterName ) )
+        {
+            return false;
+        }
+
+        _character[ characterName ]                           = -1;
+        Penumbra.Config.CharacterCollections[ characterName ] = ModCollection2.Empty.Name;
+        Penumbra.Config.Save();
+        CollectionChanged?.Invoke( null, ModCollection2.Empty, CollectionType.Character, characterName );
+        return true;
+    }
+
+    public void RemoveCharacterCollection( string characterName )
+    {
+        if( _character.TryGetValue( characterName, out var collection ) )
+        {
+            RemoveCache( collection );
+            _character.Remove( characterName );
+            CollectionChanged?.Invoke( this[ collection ], null, CollectionType.Character, characterName );
+        }
+
+        if( Penumbra.Config.CharacterCollections.Remove( characterName ) )
+        {
+            Penumbra.Config.Save();
+        }
+    }
+
+    private int GetIndexForCollectionName( string name )
+    {
+        if( name.Length == 0 || name == ModCollection2.DefaultCollection )
+        {
+            return -1;
+        }
+
+        var idx = _collections.IndexOf( c => c.Name == Penumbra.Config.DefaultCollection );
+        return idx < 0 ? -2 : idx;
+    }
+
+    public void LoadCollections()
+    {
+        var configChanged = false;
+        _defaultIdx = GetIndexForCollectionName( Penumbra.Config.DefaultCollection );
+        if( _defaultIdx == -2 )
+        {
+            PluginLog.Error( $"Last choice of Default Collection {Penumbra.Config.DefaultCollection} is not available, reset to None." );
+            _defaultIdx                       = -1;
+            Penumbra.Config.DefaultCollection = this[ _defaultIdx ].Name;
+            configChanged                     = true;
+        }
+
+        _currentIdx = GetIndexForCollectionName( Penumbra.Config.CurrentCollection );
+        if( _currentIdx == -2 )
+        {
+            PluginLog.Error( $"Last choice of Current Collection {Penumbra.Config.CurrentCollection} is not available, reset to Default." );
+            _currentIdx                       = _defaultNameIdx;
+            Penumbra.Config.DefaultCollection = this[ _currentIdx ].Name;
+            configChanged                     = true;
+        }
+
+        if( LoadCharacterCollections() || configChanged )
+        {
+            Penumbra.Config.Save();
+        }
+
+        CreateNecessaryCaches();
+    }
+
+    private bool LoadCharacterCollections()
+    {
+        var configChanged = false;
+        foreach( var (player, collectionName) in Penumbra.Config.CharacterCollections.ToArray() )
+        {
+            var idx = GetIndexForCollectionName( collectionName );
+            if( idx == -2 )
+            {
+                PluginLog.Error( $"Last choice of <{player}>'s Collection {collectionName} is not available, reset to None." );
+                _character.Add( player, -1 );
+                Penumbra.Config.CharacterCollections[ player ] = ModCollection2.Empty.Name;
+                configChanged                                  = true;
+            }
+            else
+            {
+                _character.Add( player, idx );
+            }
+        }
+
+        return configChanged;
+    }
+}
\ No newline at end of file
diff --git a/Penumbra/Collections/CollectionManager.cs b/Penumbra/Collections/CollectionManager.cs
new file mode 100644
index 00000000..7fd81136
--- /dev/null
+++ b/Penumbra/Collections/CollectionManager.cs
@@ -0,0 +1,223 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.Contracts;
+using System.IO;
+using System.Linq;
+using Dalamud.Logging;
+using Penumbra.Mods;
+using Penumbra.Util;
+
+namespace Penumbra.Collections;
+
+public enum CollectionType : byte
+{
+    Inactive,
+    Default,
+    Character,
+    Current,
+}
+
+public sealed partial class CollectionManager2 : IDisposable, IEnumerable< ModCollection2 >
+{
+    public delegate void CollectionChangeDelegate( ModCollection2? oldCollection, ModCollection2? newCollection, CollectionType type,
+        string? characterName = null );
+
+    private readonly ModManager _modManager;
+
+    private readonly List< ModCollection2 > _collections = new();
+
+    public ModCollection2 this[ Index idx ]
+        => idx.Value == -1 ? ModCollection2.Empty : _collections[ idx ];
+
+    public ModCollection2? this[ string name ]
+        => ByName( name, out var c ) ? c : null;
+
+    public bool ByName( string name, [NotNullWhen( true )] out ModCollection2? collection )
+        => _collections.FindFirst( c => string.Equals( c.Name, name, StringComparison.InvariantCultureIgnoreCase ), out collection );
+
+    public IEnumerator< ModCollection2 > GetEnumerator()
+        => _collections.GetEnumerator();
+
+    IEnumerator IEnumerable.GetEnumerator()
+        => GetEnumerator();
+
+    public CollectionManager2( ModManager manager )
+    {
+        _modManager = manager;
+
+        _modManager.ModsRediscovered += OnModsRediscovered;
+        _modManager.ModChange        += OnModChanged;
+        ReadCollections();
+        LoadCollections();
+    }
+
+    public void Dispose()
+    {
+        _modManager.ModsRediscovered -= OnModsRediscovered;
+        _modManager.ModChange        -= OnModChanged;
+    }
+
+    private void OnModsRediscovered()
+    {
+        UpdateCaches();
+        Default.SetFiles();
+    }
+
+    private void AddDefaultCollection()
+    {
+        var idx = _collections.IndexOf( c => c.Name == ModCollection2.DefaultCollection );
+        if( idx >= 0 )
+        {
+            _defaultNameIdx = idx;
+            return;
+        }
+
+        var defaultCollection = ModCollection2.CreateNewEmpty( ModCollection2.DefaultCollection );
+        defaultCollection.Save();
+        _defaultNameIdx = _collections.Count;
+        _collections.Add( defaultCollection );
+    }
+
+    private void ApplyInheritancesAndFixSettings( IEnumerable< IReadOnlyList< string > > inheritances )
+    {
+        foreach( var (collection, inheritance) in this.Zip( inheritances ) )
+        {
+            var changes = false;
+            foreach( var subCollectionName in inheritance )
+            {
+                if( !ByName( subCollectionName, out var subCollection ) )
+                {
+                    changes = true;
+                    PluginLog.Warning( $"Inherited collection {subCollectionName} for {collection.Name} does not exist, removed." );
+                }
+                else if( !collection.AddInheritance( subCollection ) )
+                {
+                    changes = true;
+                    PluginLog.Warning( $"{collection.Name} can not inherit from {subCollectionName}, removed." );
+                }
+            }
+
+            foreach( var (setting, mod) in collection.Settings.Zip( _modManager.Mods ).Where( s => s.First != null ) )
+            {
+                changes |= setting!.FixInvalidSettings( mod.Meta );
+            }
+
+            if( changes )
+            {
+                collection.Save();
+            }
+        }
+    }
+
+    private void ReadCollections()
+    {
+        var collectionDir = new DirectoryInfo( ModCollection2.CollectionDirectory );
+        var inheritances  = new List< IReadOnlyList< string > >();
+        if( collectionDir.Exists )
+        {
+            foreach( var file in collectionDir.EnumerateFiles( "*.json" ) )
+            {
+                var collection = ModCollection2.LoadFromFile( file, out var inheritance );
+                if( collection == null || collection.Name.Length == 0 )
+                {
+                    continue;
+                }
+
+                if( file.Name != $"{collection.Name.RemoveInvalidPathSymbols()}.json" )
+                {
+                    PluginLog.Warning( $"Collection {file.Name} does not correspond to {collection.Name}." );
+                }
+
+                if( this[ collection.Name ] != null )
+                {
+                    PluginLog.Warning( $"Duplicate collection found: {collection.Name} already exists." );
+                }
+                else
+                {
+                    inheritances.Add( inheritance );
+                    _collections.Add( collection );
+                }
+            }
+        }
+
+        AddDefaultCollection();
+        ApplyInheritancesAndFixSettings( inheritances );
+    }
+
+    public bool AddCollection( string name, ModCollection2? duplicate )
+    {
+        var nameFixed = name.RemoveInvalidPathSymbols().ToLowerInvariant();
+        if( nameFixed.Length == 0
+        || nameFixed         == ModCollection2.Empty.Name.ToLowerInvariant()
+        || _collections.Any( c => c.Name.RemoveInvalidPathSymbols().ToLowerInvariant() == nameFixed ) )
+        {
+            PluginLog.Warning( $"The new collection {name} would lead to the same path as one that already exists." );
+            return false;
+        }
+
+        var newCollection = duplicate?.Duplicate( name ) ?? ModCollection2.CreateNewEmpty( name );
+        _collections.Add( newCollection );
+        newCollection.Save();
+        CollectionChanged?.Invoke( null, newCollection, CollectionType.Inactive );
+        SetCollection( _collections.Count - 1, CollectionType.Current );
+        return true;
+    }
+
+    public bool RemoveCollection( int idx )
+    {
+        if( idx < 0 || idx >= _collections.Count )
+        {
+            PluginLog.Error( "Can not remove the empty collection." );
+            return false;
+        }
+
+        if( idx == _defaultNameIdx )
+        {
+            PluginLog.Error( "Can not remove the default collection." );
+            return false;
+        }
+
+        if( idx == _currentIdx )
+        {
+            SetCollection( _defaultNameIdx, CollectionType.Current );
+        }
+        else if( _currentIdx > idx )
+        {
+            --_currentIdx;
+        }
+
+        if( idx == _defaultIdx )
+        {
+            SetCollection( -1, CollectionType.Default );
+        }
+        else if( _defaultIdx > idx )
+        {
+            --_defaultIdx;
+        }
+
+        if( _defaultNameIdx > idx )
+        {
+            --_defaultNameIdx;
+        }
+
+        foreach( var (characterName, characterIdx) in _character.ToList() )
+        {
+            if( idx == characterIdx )
+            {
+                SetCollection( -1, CollectionType.Character, characterName );
+            }
+            else if( characterIdx > idx )
+            {
+                _character[ characterName ] = characterIdx - 1;
+            }
+        }
+
+        var collection = _collections[ idx ];
+        collection.Delete();
+        _collections.RemoveAt( idx );
+        CollectionChanged?.Invoke( collection, null, CollectionType.Inactive );
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/Penumbra/Collections/ModCollection.Cache.cs b/Penumbra/Collections/ModCollection.Cache.cs
new file mode 100644
index 00000000..697dde2f
--- /dev/null
+++ b/Penumbra/Collections/ModCollection.Cache.cs
@@ -0,0 +1,472 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using Dalamud.Logging;
+using Penumbra.GameData.ByteString;
+using Penumbra.Meta.Manager;
+using Penumbra.Mod;
+using Penumbra.Util;
+
+namespace Penumbra.Collections;
+
+public partial class ModCollection2
+{
+    private Cache? _cache;
+
+    public bool HasCache
+        => _cache != null;
+
+    public void CreateCache()
+    {
+        if( _cache == null )
+        {
+            _cache = new Cache( this );
+            _cache.CalculateEffectiveFileList();
+        }
+    }
+
+    public void UpdateCache()
+        => _cache?.CalculateEffectiveFileList();
+
+    public void ClearCache()
+        => _cache = null;
+
+    public FullPath? ResolvePath( Utf8GamePath path )
+        => _cache?.ResolvePath( path );
+
+    internal void ForceFile( Utf8GamePath path, FullPath fullPath )
+        => _cache!.ResolvedFiles[ path ] = fullPath;
+
+    internal void RemoveFile( Utf8GamePath path )
+        => _cache!.ResolvedFiles.Remove( path );
+
+    internal MetaManager? MetaCache
+        => _cache?.MetaManipulations;
+
+    internal IReadOnlyDictionary< Utf8GamePath, FullPath > ResolvedFiles
+        => _cache?.ResolvedFiles ?? new Dictionary< Utf8GamePath, FullPath >();
+
+    internal IReadOnlySet< FullPath > MissingFiles
+        => _cache?.MissingFiles ?? new HashSet< FullPath >();
+
+    internal IReadOnlyDictionary< string, object? > ChangedItems
+        => _cache?.ChangedItems ?? new Dictionary< string, object? >();
+
+    internal IReadOnlyList< ConflictCache.ModCacheStruct > Conflicts
+        => _cache?.Conflicts.Conflicts ?? Array.Empty< ConflictCache.ModCacheStruct >();
+
+    public void CalculateEffectiveFileList( bool withMetaManipulations, bool reloadResident )
+    {
+        PluginLog.Debug( "Recalculating effective file list for {CollectionName} [{WithMetaManipulations}]", Name, withMetaManipulations );
+        _cache ??= new Cache( this );
+        _cache.CalculateEffectiveFileList();
+        if( withMetaManipulations )
+        {
+            _cache.UpdateMetaManipulations();
+        }
+
+        if( reloadResident )
+        {
+            Penumbra.ResidentResources.Reload();
+        }
+    }
+
+
+    // The ModCollectionCache contains all required temporary data to use a collection.
+    // It will only be setup if a collection gets activated in any way.
+    private class Cache
+    {
+        // Shared caches to avoid allocations.
+        private static readonly BitArray                        FileSeen         = new(256);
+        private static readonly Dictionary< Utf8GamePath, int > RegisteredFiles  = new(256);
+        private static readonly List< ModSettings? >            ResolvedSettings = new(128);
+
+        private readonly ModCollection2                       _collection;
+        private readonly SortedList< string, object? >        _changedItems = new();
+        public readonly  Dictionary< Utf8GamePath, FullPath > ResolvedFiles = new();
+        public readonly  HashSet< FullPath >                  MissingFiles  = new();
+        public readonly  MetaManager                          MetaManipulations;
+        public           ConflictCache                        Conflicts;
+
+        public IReadOnlyDictionary< string, object? > ChangedItems
+        {
+            get
+            {
+                SetChangedItems();
+                return _changedItems;
+            }
+        }
+
+        public Cache( ModCollection2 collection )
+        {
+            _collection       = collection;
+            MetaManipulations = new MetaManager( collection );
+        }
+
+        private static void ResetFileSeen( int size )
+        {
+            if( size < FileSeen.Length )
+            {
+                FileSeen.Length = size;
+                FileSeen.SetAll( false );
+            }
+            else
+            {
+                FileSeen.SetAll( false );
+                FileSeen.Length = size;
+            }
+        }
+
+        private void ClearStorageAndPrepare()
+        {
+            ResolvedFiles.Clear();
+            MissingFiles.Clear();
+            RegisteredFiles.Clear();
+            _changedItems.Clear();
+            ResolvedSettings.Clear();
+            ResolvedSettings.AddRange( _collection.ActualSettings );
+        }
+
+        public void CalculateEffectiveFileList()
+        {
+            ClearStorageAndPrepare();
+
+            for( var i = 0; i < Penumbra.ModManager.Mods.Count; ++i )
+            {
+                if( ResolvedSettings[ i ]?.Enabled == true )
+                {
+                    AddFiles( i );
+                    AddSwaps( i );
+                }
+            }
+
+            AddMetaFiles();
+            Conflicts.Sort();
+        }
+
+        private void SetChangedItems()
+        {
+            if( _changedItems.Count > 0 || ResolvedFiles.Count + MetaManipulations.Count == 0 )
+            {
+                return;
+            }
+
+            try
+            {
+                // Skip IMCs because they would result in far too many false-positive items,
+                // since they are per set instead of per item-slot/item/variant.
+                var identifier = GameData.GameData.GetIdentifier();
+                foreach( var resolved in ResolvedFiles.Keys.Where( file => !file.Path.EndsWith( 'i', 'm', 'c' ) ) )
+                {
+                    identifier.Identify( _changedItems, resolved.ToGamePath() );
+                }
+            }
+            catch( Exception e )
+            {
+                PluginLog.Error( $"Unknown Error:\n{e}" );
+            }
+        }
+
+
+        private void AddFiles( int idx )
+        {
+            var mod = Penumbra.ModManager.Mods[ idx ];
+            ResetFileSeen( mod.Resources.ModFiles.Count );
+            // Iterate in reverse so that later groups take precedence before earlier ones.
+            foreach( var group in mod.Meta.Groups.Values.Reverse() )
+            {
+                switch( group.SelectionType )
+                {
+                    case SelectType.Single:
+                        AddFilesForSingle( group, mod, idx );
+                        break;
+                    case SelectType.Multi:
+                        AddFilesForMulti( group, mod, idx );
+                        break;
+                    default: throw new InvalidEnumArgumentException();
+                }
+            }
+
+            AddRemainingFiles( mod, idx );
+        }
+
+        // If audio streaming is not disabled, replacing .scd files crashes the game,
+        // so only add those files if it is disabled.
+        private static bool FilterFile( Utf8GamePath gamePath )
+            => !Penumbra.Config.DisableSoundStreaming
+             && gamePath.Path.EndsWith( '.', 's', 'c', 'd' );
+
+
+        private void AddFile( int modIdx, Utf8GamePath gamePath, FullPath file )
+        {
+            if( FilterFile( gamePath ) )
+            {
+                return;
+            }
+
+            if( !RegisteredFiles.TryGetValue( gamePath, out var oldModIdx ) )
+            {
+                RegisteredFiles.Add( gamePath, modIdx );
+                ResolvedFiles[ gamePath ] = file;
+            }
+            else
+            {
+                var priority    = ResolvedSettings[ modIdx ]!.Priority;
+                var oldPriority = ResolvedSettings[ oldModIdx ]!.Priority;
+                Conflicts.AddConflict( oldModIdx, modIdx, oldPriority, priority, gamePath );
+                if( priority > oldPriority )
+                {
+                    ResolvedFiles[ gamePath ]   = file;
+                    RegisteredFiles[ gamePath ] = modIdx;
+                }
+            }
+        }
+
+        private void AddMissingFile( FullPath file )
+        {
+            switch( file.Extension.ToLowerInvariant() )
+            {
+                case ".meta":
+                case ".rgsp":
+                    return;
+                default:
+                    MissingFiles.Add( file );
+                    return;
+            }
+        }
+
+        private void AddPathsForOption( Option option, ModData mod, int modIdx, bool enabled )
+        {
+            foreach( var (file, paths) in option.OptionFiles )
+            {
+                var fullPath = new FullPath( mod.BasePath, file );
+                var idx      = mod.Resources.ModFiles.IndexOf( f => f.Equals( fullPath ) );
+                if( idx < 0 )
+                {
+                    AddMissingFile( fullPath );
+                    continue;
+                }
+
+                var registeredFile = mod.Resources.ModFiles[ idx ];
+                if( !registeredFile.Exists )
+                {
+                    AddMissingFile( registeredFile );
+                    continue;
+                }
+
+                FileSeen.Set( idx, true );
+                if( enabled )
+                {
+                    foreach( var path in paths )
+                    {
+                        AddFile( modIdx, path, registeredFile );
+                    }
+                }
+            }
+        }
+
+        private void AddFilesForSingle( OptionGroup singleGroup, ModData mod, int modIdx )
+        {
+            Debug.Assert( singleGroup.SelectionType == SelectType.Single );
+            var settings = ResolvedSettings[ modIdx ]!;
+            if( !settings.Settings.TryGetValue( singleGroup.GroupName, out var setting ) )
+            {
+                setting = 0;
+            }
+
+            for( var i = 0; i < singleGroup.Options.Count; ++i )
+            {
+                AddPathsForOption( singleGroup.Options[ i ], mod, modIdx, setting == i );
+            }
+        }
+
+        private void AddFilesForMulti( OptionGroup multiGroup, ModData mod, int modIdx )
+        {
+            Debug.Assert( multiGroup.SelectionType == SelectType.Multi );
+            var settings = ResolvedSettings[ modIdx ]!;
+            if( !settings.Settings.TryGetValue( multiGroup.GroupName, out var setting ) )
+            {
+                return;
+            }
+
+            // Also iterate options in reverse so that later options take precedence before earlier ones.
+            for( var i = multiGroup.Options.Count - 1; i >= 0; --i )
+            {
+                AddPathsForOption( multiGroup.Options[ i ], mod, modIdx, ( setting & ( 1 << i ) ) != 0 );
+            }
+        }
+
+        private void AddRemainingFiles( ModData mod, int modIdx )
+        {
+            for( var i = 0; i < mod.Resources.ModFiles.Count; ++i )
+            {
+                if( FileSeen.Get( i ) )
+                {
+                    continue;
+                }
+
+                var file = mod.Resources.ModFiles[ i ];
+                if( file.Exists )
+                {
+                    if( file.ToGamePath( mod.BasePath, out var gamePath ) )
+                    {
+                        AddFile( modIdx, gamePath, file );
+                    }
+                    else
+                    {
+                        PluginLog.Warning( $"Could not convert {file} in {mod.BasePath.FullName} to GamePath." );
+                    }
+                }
+                else
+                {
+                    MissingFiles.Add( file );
+                }
+            }
+        }
+
+        private void AddMetaFiles()
+            => MetaManipulations.Imc.SetFiles();
+
+        private void AddSwaps( int modIdx )
+        {
+            var mod = Penumbra.ModManager.Mods[ modIdx ];
+            foreach( var (gamePath, swapPath) in mod.Meta.FileSwaps.Where( kvp => !FilterFile( kvp.Key ) ) )
+            {
+                AddFile( modIdx, gamePath, swapPath );
+            }
+        }
+
+        private void AddManipulations( int modIdx )
+        {
+            var mod = Penumbra.ModManager.Mods[ modIdx ];
+            foreach( var manip in mod.Resources.MetaManipulations.GetManipulationsForConfig( ResolvedSettings[ modIdx ]!, mod.Meta ) )
+            {
+                if( !MetaManipulations.TryGetValue( manip, out var oldModIdx ) )
+                {
+                    MetaManipulations.ApplyMod( manip, modIdx );
+                }
+                else
+                {
+                    var priority    = ResolvedSettings[ modIdx ]!.Priority;
+                    var oldPriority = ResolvedSettings[ oldModIdx ]!.Priority;
+                    Conflicts.AddConflict( oldModIdx, modIdx, oldPriority, priority, manip );
+                    if( priority > oldPriority )
+                    {
+                        MetaManipulations.ApplyMod( manip, modIdx );
+                    }
+                }
+            }
+        }
+
+        public void UpdateMetaManipulations()
+        {
+            MetaManipulations.Reset();
+            Conflicts.ClearMetaConflicts();
+
+            foreach( var mod in Penumbra.ModManager.Mods.Zip( ResolvedSettings )
+                       .Select( ( m, i ) => ( m.First, m.Second, i ) )
+                       .Where( m => m.Second?.Enabled == true && m.First.Resources.MetaManipulations.Count > 0 ) )
+            {
+                AddManipulations( mod.i );
+            }
+        }
+
+        public FullPath? ResolvePath( Utf8GamePath gameResourcePath )
+        {
+            if( !ResolvedFiles.TryGetValue( gameResourcePath, out var candidate ) )
+            {
+                return null;
+            }
+
+            if( candidate.InternalName.Length > Utf8GamePath.MaxGamePathLength
+            || candidate.IsRooted && !candidate.Exists )
+            {
+                return null;
+            }
+
+            return candidate;
+        }
+    }
+
+    [Conditional( "USE_EQP" )]
+    public void SetEqpFiles()
+    {
+        if( _cache == null )
+        {
+            MetaManager.MetaManagerEqp.ResetFiles();
+        }
+        else
+        {
+            _cache.MetaManipulations.Eqp.SetFiles();
+        }
+    }
+
+    [Conditional( "USE_EQDP" )]
+    public void SetEqdpFiles()
+    {
+        if( _cache == null )
+        {
+            MetaManager.MetaManagerEqdp.ResetFiles();
+        }
+        else
+        {
+            _cache.MetaManipulations.Eqdp.SetFiles();
+        }
+    }
+
+    [Conditional( "USE_GMP" )]
+    public void SetGmpFiles()
+    {
+        if( _cache == null )
+        {
+            MetaManager.MetaManagerGmp.ResetFiles();
+        }
+        else
+        {
+            _cache.MetaManipulations.Gmp.SetFiles();
+        }
+    }
+
+    [Conditional( "USE_EST" )]
+    public void SetEstFiles()
+    {
+        if( _cache == null )
+        {
+            MetaManager.MetaManagerEst.ResetFiles();
+        }
+        else
+        {
+            _cache.MetaManipulations.Est.SetFiles();
+        }
+    }
+
+    [Conditional( "USE_CMP" )]
+    public void SetCmpFiles()
+    {
+        if( _cache == null )
+        {
+            MetaManager.MetaManagerCmp.ResetFiles();
+        }
+        else
+        {
+            _cache.MetaManipulations.Cmp.SetFiles();
+        }
+    }
+
+    public void SetFiles()
+    {
+        if( _cache == null )
+        {
+            Penumbra.CharacterUtility.ResetAll();
+        }
+        else
+        {
+            _cache.MetaManipulations.SetFiles();
+        }
+    }
+}
\ No newline at end of file
diff --git a/Penumbra/Mods/ModCollection.Changes.cs b/Penumbra/Collections/ModCollection.Changes.cs
similarity index 99%
rename from Penumbra/Mods/ModCollection.Changes.cs
rename to Penumbra/Collections/ModCollection.Changes.cs
index 0423ffe8..02f6f240 100644
--- a/Penumbra/Mods/ModCollection.Changes.cs
+++ b/Penumbra/Collections/ModCollection.Changes.cs
@@ -1,7 +1,7 @@
 using System;
 using Penumbra.Mod;
 
-namespace Penumbra.Mods;
+namespace Penumbra.Collections;
 
 public enum ModSettingChange
 {
diff --git a/Penumbra/Mods/ModCollection.Inheritance.cs b/Penumbra/Collections/ModCollection.Inheritance.cs
similarity index 97%
rename from Penumbra/Mods/ModCollection.Inheritance.cs
rename to Penumbra/Collections/ModCollection.Inheritance.cs
index 13ba09ca..dee20aef 100644
--- a/Penumbra/Mods/ModCollection.Inheritance.cs
+++ b/Penumbra/Collections/ModCollection.Inheritance.cs
@@ -4,7 +4,7 @@ using System.Linq;
 using Penumbra.Mod;
 using Penumbra.Util;
 
-namespace Penumbra.Mods;
+namespace Penumbra.Collections;
 
 public partial class ModCollection2
 {
@@ -53,7 +53,7 @@ public partial class ModCollection2
         }
     }
 
-    public (ModSettings? Settings, ModCollection2 Collection) this[ int idx ]
+    public (ModSettings? Settings, ModCollection2 Collection) this[ Index idx ]
     {
         get
         {
diff --git a/Penumbra/Mods/ModCollection.Migration.cs b/Penumbra/Collections/ModCollection.Migration.cs
similarity index 94%
rename from Penumbra/Mods/ModCollection.Migration.cs
rename to Penumbra/Collections/ModCollection.Migration.cs
index 76b40ae7..abd935ab 100644
--- a/Penumbra/Mods/ModCollection.Migration.cs
+++ b/Penumbra/Collections/ModCollection.Migration.cs
@@ -1,9 +1,9 @@
 using System.Linq;
 using Penumbra.Mod;
 
-namespace Penumbra.Mods;
+namespace Penumbra.Collections;
 
-public partial class ModCollection2
+public sealed partial class ModCollection2
 {
     private static class Migration
     {
diff --git a/Penumbra/Collections/ModCollection.cs b/Penumbra/Collections/ModCollection.cs
new file mode 100644
index 00000000..5f6c46ea
--- /dev/null
+++ b/Penumbra/Collections/ModCollection.cs
@@ -0,0 +1,209 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+using Dalamud.Logging;
+using Newtonsoft.Json.Linq;
+using Penumbra.Mod;
+using Penumbra.Util;
+
+namespace Penumbra.Collections;
+
+// A ModCollection is a named set of ModSettings to all of the users' installed mods.
+// It is meant to be local only, and thus should always contain settings for every mod, not just the enabled ones.
+// Settings to mods that are not installed anymore are kept as long as no call to CleanUnavailableSettings is made.
+// Active ModCollections build a cache of currently relevant data.
+public partial class ModCollection2
+{
+    public const int    CurrentVersion    = 1;
+    public const string DefaultCollection = "Default";
+
+    public static readonly ModCollection2 Empty = CreateNewEmpty( "None" );
+
+    public string Name { get; private init; }
+    public int Version { get; private set; }
+
+    private readonly List< ModSettings? > _settings;
+
+    public IReadOnlyList< ModSettings? > Settings
+        => _settings;
+
+    public IEnumerable< ModSettings? > ActualSettings
+        => Enumerable.Range( 0, _settings.Count ).Select( i => this[ i ].Settings );
+
+    private readonly Dictionary< string, ModSettings > _unusedSettings;
+
+
+    private ModCollection2( string name, ModCollection2 duplicate )
+    {
+        Name               =  name;
+        Version            =  duplicate.Version;
+        _settings          =  duplicate._settings.ConvertAll( s => s?.DeepCopy() );
+        _unusedSettings    =  duplicate._unusedSettings.ToDictionary( kvp => kvp.Key, kvp => kvp.Value.DeepCopy() );
+        _inheritance       =  duplicate._inheritance.ToList();
+        ModSettingChanged  += SaveOnChange;
+        InheritanceChanged += Save;
+    }
+
+    private ModCollection2( string name, int version, Dictionary< string, ModSettings > allSettings )
+    {
+        Name            = name;
+        Version         = version;
+        _unusedSettings = allSettings;
+        _settings       = Enumerable.Repeat( ( ModSettings? )null, Penumbra.ModManager.Count ).ToList();
+        for( var i = 0; i < Penumbra.ModManager.Count; ++i )
+        {
+            var modName = Penumbra.ModManager[ i ].BasePath.Name;
+            if( _unusedSettings.TryGetValue( Penumbra.ModManager[ i ].BasePath.Name, out var settings ) )
+            {
+                _unusedSettings.Remove( modName );
+                _settings[ i ] = settings;
+            }
+        }
+
+        Migration.Migrate( this );
+        ModSettingChanged  += SaveOnChange;
+        InheritanceChanged += Save;
+    }
+
+    public static ModCollection2 CreateNewEmpty( string name )
+        => new(name, CurrentVersion, new Dictionary< string, ModSettings >());
+
+    public ModCollection2 Duplicate( string name )
+        => new(name, this);
+
+    internal static ModCollection2 MigrateFromV0( string name, Dictionary< string, ModSettings > allSettings )
+        => new(name, 0, allSettings);
+
+    private void CleanUnavailableSettings()
+    {
+        var any = _unusedSettings.Count > 0;
+        _unusedSettings.Clear();
+        if( any )
+        {
+            Save();
+        }
+    }
+
+    public void AddMod( ModData mod )
+    {
+        if( _unusedSettings.TryGetValue( mod.BasePath.Name, out var settings ) )
+        {
+            _settings.Add( settings );
+            _unusedSettings.Remove( mod.BasePath.Name );
+        }
+        else
+        {
+            _settings.Add( null );
+        }
+    }
+
+    public void RemoveMod( ModData mod, int idx )
+    {
+        var settings = _settings[ idx ];
+        if( settings != null )
+        {
+            _unusedSettings.Add( mod.BasePath.Name, settings );
+        }
+
+        _settings.RemoveAt( idx );
+    }
+
+    public static string CollectionDirectory
+        => Path.Combine( Dalamud.PluginInterface.GetPluginConfigDirectory(), "collections" );
+
+    public FileInfo FileName
+        => new(Path.Combine( CollectionDirectory, $"{Name.RemoveInvalidPathSymbols()}.json" ));
+
+    public void Save()
+    {
+        try
+        {
+            var file = FileName;
+            file.Directory?.Create();
+            using var s = file.Open( FileMode.Truncate );
+            using var w = new StreamWriter( s, Encoding.UTF8 );
+            using var j = new JsonTextWriter( w );
+            j.Formatting = Formatting.Indented;
+            var x = JsonSerializer.Create( new JsonSerializerSettings { Formatting = Formatting.Indented } );
+            j.WriteStartObject();
+            j.WritePropertyName( nameof( Version ) );
+            j.WriteValue( Version );
+            j.WritePropertyName( nameof( Name ) );
+            j.WriteValue( Name );
+            j.WritePropertyName( nameof( Settings ) );
+            j.WriteStartObject();
+            for( var i = 0; i < _settings.Count; ++i )
+            {
+                var settings = _settings[ i ];
+                if( settings != null )
+                {
+                    j.WritePropertyName( Penumbra.ModManager[ i ].BasePath.Name );
+                    x.Serialize( j, settings );
+                }
+            }
+
+            foreach( var settings in _unusedSettings )
+            {
+                j.WritePropertyName( settings.Key );
+                x.Serialize( j, settings.Value );
+            }
+
+            j.WriteEndObject();
+            j.WritePropertyName( nameof( Inheritance ) );
+            x.Serialize( j, Inheritance );
+            j.WriteEndObject();
+        }
+        catch( Exception e )
+        {
+            PluginLog.Error( $"Could not save collection {Name}:\n{e}" );
+        }
+    }
+
+    public void Delete()
+    {
+        var file = FileName;
+        if( file.Exists )
+        {
+            try
+            {
+                file.Delete();
+            }
+            catch( Exception e )
+            {
+                PluginLog.Error( $"Could not delete collection file {file.FullName} for {Name}:\n{e}" );
+            }
+        }
+    }
+
+    public static ModCollection2? LoadFromFile( FileInfo file, out IReadOnlyList< string > inheritance )
+    {
+        inheritance = Array.Empty< string >();
+        if( !file.Exists )
+        {
+            PluginLog.Error( $"Could not read collection because {file.FullName} does not exist." );
+            return null;
+        }
+
+        try
+        {
+            var obj     = JObject.Parse( File.ReadAllText( file.FullName ) );
+            var name    = obj[ nameof( Name ) ]?.ToObject< string >() ?? string.Empty;
+            var version = obj[ nameof( Version ) ]?.ToObject< int >() ?? 0;
+            var settings = obj[ nameof( Settings ) ]?.ToObject< Dictionary< string, ModSettings > >()
+             ?? new Dictionary< string, ModSettings >();
+            inheritance = obj[ nameof( Inheritance ) ]?.ToObject< List< string > >() ?? ( IReadOnlyList< string > )Array.Empty< string >();
+
+            return new ModCollection2( name, version, settings );
+        }
+        catch( Exception e )
+        {
+            PluginLog.Error( $"Could not read collection information from {file.FullName}:\n{e}" );
+        }
+
+        return null;
+    }
+}
\ No newline at end of file
diff --git a/Penumbra/Interop/Loader/ResourceLoader.Replacement.cs b/Penumbra/Interop/Loader/ResourceLoader.Replacement.cs
index d89a18b7..3d869944 100644
--- a/Penumbra/Interop/Loader/ResourceLoader.Replacement.cs
+++ b/Penumbra/Interop/Loader/ResourceLoader.Replacement.cs
@@ -8,6 +8,7 @@ using FFXIVClientStructs.FFXIV.Client.System.Resource;
 using Penumbra.GameData.ByteString;
 using Penumbra.GameData.Enums;
 using Penumbra.Interop.Structs;
+using Penumbra.Mods;
 using FileMode = Penumbra.Interop.Structs.FileMode;
 using ResourceHandle = FFXIVClientStructs.FFXIV.Client.System.Resource.Handle.ResourceHandle;
 
@@ -91,7 +92,7 @@ public unsafe partial class ResourceLoader
     // Use the default method of path replacement.
     public static (FullPath?, object?) DefaultResolver( Utf8GamePath path )
     {
-        var resolved = Penumbra.ModManager.ResolveSwappedOrReplacementPath( path );
+        var resolved = ModManager.ResolvePath( path );
         return ( resolved, null );
     }
 
diff --git a/Penumbra/Interop/Resolver/PathResolver.Data.cs b/Penumbra/Interop/Resolver/PathResolver.Data.cs
index 7907b172..ba8d6b05 100644
--- a/Penumbra/Interop/Resolver/PathResolver.Data.cs
+++ b/Penumbra/Interop/Resolver/PathResolver.Data.cs
@@ -8,6 +8,7 @@ using FFXIVClientStructs.FFXIV.Client.Game.Character;
 using FFXIVClientStructs.FFXIV.Client.Game.Object;
 using FFXIVClientStructs.FFXIV.Client.Graphics.Scene;
 using FFXIVClientStructs.FFXIV.Component.GUI;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
 using Penumbra.Mods;
 using ObjectKind = Dalamud.Game.ClientState.Objects.Enums.ObjectKind;
@@ -90,10 +91,10 @@ public unsafe partial class PathResolver
 
     // This map links DrawObjects directly to Actors (by ObjectTable index) and their collections.
     // It contains any DrawObjects that correspond to a human actor, even those without specific collections.
-    internal readonly Dictionary< IntPtr, (ModCollection, int) > DrawObjectToObject = new();
+    internal readonly Dictionary< IntPtr, (ModCollection2, int) > DrawObjectToObject = new();
 
     // This map links files to their corresponding collection, if it is non-default.
-    internal readonly ConcurrentDictionary< Utf8String, ModCollection > PathCollections = new();
+    internal readonly ConcurrentDictionary< Utf8String, ModCollection2 > PathCollections = new();
 
     internal GameObject* LastGameObject = null;
 
@@ -158,11 +159,11 @@ public unsafe partial class PathResolver
     }
 
     // Identify the correct collection for a GameObject by index and name.
-    private static ModCollection IdentifyCollection( GameObject* gameObject )
+    private static ModCollection2 IdentifyCollection( GameObject* gameObject )
     {
         if( gameObject == null )
         {
-            return Penumbra.CollectionManager.DefaultCollection;
+            return Penumbra.CollectionManager.Default;
         }
 
         var name = gameObject->ObjectIndex switch
@@ -175,13 +176,11 @@ public unsafe partial class PathResolver
             }
          ?? new Utf8String( gameObject->Name ).ToString();
 
-        return Penumbra.CollectionManager.CharacterCollection.TryGetValue( name, out var col )
-            ? col
-            : Penumbra.CollectionManager.DefaultCollection;
+        return Penumbra.CollectionManager.Character( name );
     }
 
     // Update collections linked to Game/DrawObjects due to a change in collection configuration.
-    private void CheckCollections( ModCollection? _1, ModCollection? _2, CollectionType type, string? name )
+    private void CheckCollections( ModCollection2? _1, ModCollection2? _2, CollectionType type, string? name )
     {
         if( type is not (CollectionType.Character or CollectionType.Default) )
         {
@@ -201,7 +200,7 @@ public unsafe partial class PathResolver
     }
 
     // Use the stored information to find the GameObject and Collection linked to a DrawObject.
-    private GameObject* FindParent( IntPtr drawObject, out ModCollection collection )
+    private GameObject* FindParent( IntPtr drawObject, out ModCollection2 collection )
     {
         if( DrawObjectToObject.TryGetValue( drawObject, out var data ) )
         {
@@ -226,7 +225,7 @@ public unsafe partial class PathResolver
 
 
     // Special handling for paths so that we do not store non-owned temporary strings in the dictionary.
-    private void SetCollection( Utf8String path, ModCollection collection )
+    private void SetCollection( Utf8String path, ModCollection2 collection )
     {
         if( PathCollections.ContainsKey( path ) || path.IsOwned )
         {
diff --git a/Penumbra/Interop/Resolver/PathResolver.Material.cs b/Penumbra/Interop/Resolver/PathResolver.Material.cs
index 5dcd2612..51aeeae8 100644
--- a/Penumbra/Interop/Resolver/PathResolver.Material.cs
+++ b/Penumbra/Interop/Resolver/PathResolver.Material.cs
@@ -3,6 +3,7 @@ using Dalamud.Hooking;
 using Dalamud.Logging;
 using Dalamud.Utility.Signatures;
 using FFXIVClientStructs.FFXIV.Client.System.Resource;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
 using Penumbra.GameData.Enums;
 using Penumbra.Interop.Structs;
@@ -40,7 +41,7 @@ public unsafe partial class PathResolver
         return ret;
     }
 
-    private ModCollection? _mtrlCollection;
+    private ModCollection2? _mtrlCollection;
 
     private void LoadMtrlHelper( IntPtr mtrlResourceHandle )
     {
@@ -55,7 +56,7 @@ public unsafe partial class PathResolver
     }
 
     // Check specifically for shpk and tex files whether we are currently in a material load.
-    private bool HandleMaterialSubFiles( ResourceType type, out ModCollection? collection )
+    private bool HandleMaterialSubFiles( ResourceType type, out ModCollection2? collection )
     {
         if( _mtrlCollection != null && type is ResourceType.Tex or ResourceType.Shpk )
         {
@@ -95,7 +96,7 @@ public unsafe partial class PathResolver
     }
 
     // Materials need to be set per collection so they can load their textures independently from each other.
-    private void HandleMtrlCollection( ModCollection collection, string path, bool nonDefault, ResourceType type, FullPath? resolved,
+    private static void HandleMtrlCollection( ModCollection2 collection, string path, bool nonDefault, ResourceType type, FullPath? resolved,
         out (FullPath?, object?) data )
     {
         if( nonDefault && type == ResourceType.Mtrl )
diff --git a/Penumbra/Interop/Resolver/PathResolver.Meta.cs b/Penumbra/Interop/Resolver/PathResolver.Meta.cs
index ee556c25..d32eee9f 100644
--- a/Penumbra/Interop/Resolver/PathResolver.Meta.cs
+++ b/Penumbra/Interop/Resolver/PathResolver.Meta.cs
@@ -2,6 +2,7 @@ using System;
 using Dalamud.Hooking;
 using Dalamud.Logging;
 using Dalamud.Utility.Signatures;
+using Penumbra.Collections;
 using Penumbra.Meta.Files;
 using Penumbra.Meta.Manipulations;
 using Penumbra.Mods;
@@ -160,15 +161,15 @@ public unsafe partial class PathResolver
         RspSetupCharacterHook?.Dispose();
     }
 
-    private ModCollection? GetCollection( IntPtr drawObject )
+    private ModCollection2? GetCollection( IntPtr drawObject )
     {
         var parent = FindParent( drawObject, out var collection );
-        if( parent == null || collection == Penumbra.CollectionManager.DefaultCollection )
+        if( parent == null || collection == Penumbra.CollectionManager.Default )
         {
             return null;
         }
 
-        return collection.Cache == null ? Penumbra.CollectionManager.ForcedCollection : collection;
+        return collection.HasCache ? collection : null;
     }
 
 
@@ -194,7 +195,7 @@ public unsafe partial class PathResolver
             }
         }
 
-        public static MetaChanger ChangeEqp( ModCollection collection )
+        public static MetaChanger ChangeEqp( ModCollection2 collection )
         {
 #if USE_EQP
             collection.SetEqpFiles();
@@ -232,7 +233,7 @@ public unsafe partial class PathResolver
             return new MetaChanger( MetaManipulation.Type.Unknown );
         }
 
-        public static MetaChanger ChangeEqdp( ModCollection collection )
+        public static MetaChanger ChangeEqdp( ModCollection2 collection )
         {
 #if USE_EQDP
             collection.SetEqdpFiles();
@@ -268,13 +269,13 @@ public unsafe partial class PathResolver
             return new MetaChanger( MetaManipulation.Type.Unknown );
         }
 
-        public static MetaChanger ChangeCmp( PathResolver resolver, out ModCollection? collection )
+        public static MetaChanger ChangeCmp( PathResolver resolver, out ModCollection2? collection )
         {
             if( resolver.LastGameObject != null )
             {
                 collection = IdentifyCollection( resolver.LastGameObject );
 #if USE_CMP
-                if( collection != Penumbra.CollectionManager.DefaultCollection && collection.Cache != null )
+                if( collection != Penumbra.CollectionManager.Default && collection.HasCache )
                 {
                     collection.SetCmpFiles();
                     return new MetaChanger( MetaManipulation.Type.Rsp );
@@ -309,25 +310,25 @@ public unsafe partial class PathResolver
                 case MetaManipulation.Type.Eqdp:
                     if( --_eqdpCounter == 0 )
                     {
-                        Penumbra.CollectionManager.DefaultCollection.SetEqdpFiles();
+                        Penumbra.CollectionManager.Default.SetEqdpFiles();
                     }
 
                     break;
                 case MetaManipulation.Type.Eqp:
                     if( --_eqpCounter == 0 )
                     {
-                        Penumbra.CollectionManager.DefaultCollection.SetEqpFiles();
+                        Penumbra.CollectionManager.Default.SetEqpFiles();
                     }
 
                     break;
                 case MetaManipulation.Type.Est:
-                    Penumbra.CollectionManager.DefaultCollection.SetEstFiles();
+                    Penumbra.CollectionManager.Default.SetEstFiles();
                     break;
                 case MetaManipulation.Type.Gmp:
-                    Penumbra.CollectionManager.DefaultCollection.SetGmpFiles();
+                    Penumbra.CollectionManager.Default.SetGmpFiles();
                     break;
                 case MetaManipulation.Type.Rsp:
-                    Penumbra.CollectionManager.DefaultCollection.SetCmpFiles();
+                    Penumbra.CollectionManager.Default.SetCmpFiles();
                     break;
             }
         }
diff --git a/Penumbra/Interop/Resolver/PathResolver.Resolve.cs b/Penumbra/Interop/Resolver/PathResolver.Resolve.cs
index e6d443ed..eea23033 100644
--- a/Penumbra/Interop/Resolver/PathResolver.Resolve.cs
+++ b/Penumbra/Interop/Resolver/PathResolver.Resolve.cs
@@ -1,8 +1,8 @@
 using System;
 using System.Runtime.CompilerServices;
 using FFXIVClientStructs.FFXIV.Client.Graphics.Scene;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
-using Penumbra.Mods;
 
 namespace Penumbra.Interop.Resolver;
 
@@ -104,7 +104,7 @@ public unsafe partial class PathResolver
     [MethodImpl( MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization )]
     private IntPtr ResolvePathDetour( IntPtr drawObject, IntPtr path )
         => ResolvePathDetour( FindParent( drawObject, out var collection ) == null
-            ? Penumbra.CollectionManager.DefaultCollection
+            ? Penumbra.CollectionManager.Default
             : collection, path );
 
     // Weapons have the characters DrawObject as a parent,
@@ -123,14 +123,14 @@ public unsafe partial class PathResolver
         {
             var parent = FindParent( ( IntPtr )parentObject, out var collection );
             return ResolvePathDetour( parent == null
-                ? Penumbra.CollectionManager.DefaultCollection
+                ? Penumbra.CollectionManager.Default
                 : collection, path );
         }
     }
 
     // Just add or remove the resolved path.
     [MethodImpl( MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization )]
-    private IntPtr ResolvePathDetour( ModCollection collection, IntPtr path )
+    private IntPtr ResolvePathDetour( ModCollection2 collection, IntPtr path )
     {
         if( path == IntPtr.Zero )
         {
diff --git a/Penumbra/Interop/Resolver/PathResolver.cs b/Penumbra/Interop/Resolver/PathResolver.cs
index 9dc67a17..4c85380c 100644
--- a/Penumbra/Interop/Resolver/PathResolver.cs
+++ b/Penumbra/Interop/Resolver/PathResolver.cs
@@ -1,6 +1,7 @@
 using System;
 using Dalamud.Utility.Signatures;
 using FFXIVClientStructs.FFXIV.Client.System.Resource;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
 using Penumbra.GameData.Enums;
 using Penumbra.Interop.Loader;
@@ -39,27 +40,17 @@ public partial class PathResolver : IDisposable
         var nonDefault = HandleMaterialSubFiles( type, out var collection ) || PathCollections.TryRemove( gamePath.Path, out collection );
         if( !nonDefault )
         {
-            collection = Penumbra.CollectionManager.DefaultCollection;
+            collection = Penumbra.CollectionManager.Default;
         }
 
         // Resolve using character/default collection first, otherwise forced, as usual.
-        var resolved = collection!.ResolveSwappedOrReplacementPath( gamePath );
-        if( resolved == null )
-        {
-            resolved = Penumbra.CollectionManager.ForcedCollection.ResolveSwappedOrReplacementPath( gamePath );
-            if( resolved == null )
-            {
-                // We also need to handle defaulted materials against a non-default collection.
-                HandleMtrlCollection( collection, gamePath.Path.ToString(), nonDefault, type, resolved, out data );
-                return true;
-            }
-
-            collection = Penumbra.CollectionManager.ForcedCollection;
-        }
+        var resolved = collection!.ResolvePath( gamePath );
 
         // Since mtrl files load their files separately, we need to add the new, resolved path
         // so that the functions loading tex and shpk can find that path and use its collection.
-        HandleMtrlCollection( collection, resolved.Value.FullName, nonDefault, type, resolved, out data );
+        // We also need to handle defaulted materials against a non-default collection.
+        var path = resolved == null ? gamePath.Path.ToString() : resolved.Value.FullName;
+        HandleMtrlCollection( collection, path, nonDefault, type, resolved, out data );
         return true;
     }
 
@@ -113,14 +104,14 @@ public partial class PathResolver : IDisposable
         Penumbra.CollectionManager.CollectionChanged -= OnCollectionChange;
     }
 
-    private void OnCollectionChange( ModCollection? _1, ModCollection? _2, CollectionType type, string? characterName )
+    private void OnCollectionChange( ModCollection2? _1, ModCollection2? _2, CollectionType type, string? characterName )
     {
         if( type != CollectionType.Character )
         {
             return;
         }
 
-        if( Penumbra.CollectionManager.CharacterCollection.Count > 0 )
+        if( Penumbra.CollectionManager.HasCharacterCollections )
         {
             Enable();
         }
diff --git a/Penumbra/Meta/Manager/MetaManager.Cmp.cs b/Penumbra/Meta/Manager/MetaManager.Cmp.cs
index 6cfa47b8..ce838fe9 100644
--- a/Penumbra/Meta/Manager/MetaManager.Cmp.cs
+++ b/Penumbra/Meta/Manager/MetaManager.Cmp.cs
@@ -12,8 +12,8 @@ public partial class MetaManager
 {
     public struct MetaManagerCmp : IDisposable
     {
-        public          CmpFile?                               File          = null;
-        public readonly Dictionary< RspManipulation, Mod.Mod > Manipulations = new();
+        public          CmpFile?                           File          = null;
+        public readonly Dictionary< RspManipulation, int > Manipulations = new();
 
         public MetaManagerCmp()
         { }
@@ -38,14 +38,10 @@ public partial class MetaManager
             Manipulations.Clear();
         }
 
-        public bool ApplyMod( RspManipulation m, Mod.Mod mod )
+        public bool ApplyMod( RspManipulation m, int modIdx )
         {
 #if USE_CMP
-            if( !Manipulations.TryAdd( m, mod ) )
-            {
-                return false;
-            }
-
+            Manipulations[ m ] = modIdx;
             File ??= new CmpFile();
             return m.Apply( File );
 #else
diff --git a/Penumbra/Meta/Manager/MetaManager.Eqdp.cs b/Penumbra/Meta/Manager/MetaManager.Eqdp.cs
index 1dba4520..785d3d2e 100644
--- a/Penumbra/Meta/Manager/MetaManager.Eqdp.cs
+++ b/Penumbra/Meta/Manager/MetaManager.Eqdp.cs
@@ -16,7 +16,7 @@ public partial class MetaManager
     {
         public ExpandedEqdpFile?[] Files = new ExpandedEqdpFile?[CharacterUtility.NumEqdpFiles - 1]; // TODO: female Hrothgar
 
-        public readonly Dictionary< EqdpManipulation, Mod.Mod > Manipulations = new();
+        public readonly Dictionary< EqdpManipulation, int > Manipulations = new();
 
         public MetaManagerEqdp()
         { }
@@ -50,14 +50,10 @@ public partial class MetaManager
             Manipulations.Clear();
         }
 
-        public bool ApplyMod( EqdpManipulation m, Mod.Mod mod )
+        public bool ApplyMod( EqdpManipulation m, int modIdx )
         {
 #if USE_EQDP
-            if( !Manipulations.TryAdd( m, mod ) )
-            {
-                return false;
-            }
-
+            Manipulations[ m ] = modIdx;
             var file = Files[ Array.IndexOf( CharacterUtility.EqdpIndices, m.FileIndex() ) ] ??=
                 new ExpandedEqdpFile( Names.CombinedRace( m.Gender, m.Race ), m.Slot.IsAccessory() ); // TODO: female Hrothgar
             return m.Apply( file );
diff --git a/Penumbra/Meta/Manager/MetaManager.Eqp.cs b/Penumbra/Meta/Manager/MetaManager.Eqp.cs
index dd7c63ff..92d8f3d8 100644
--- a/Penumbra/Meta/Manager/MetaManager.Eqp.cs
+++ b/Penumbra/Meta/Manager/MetaManager.Eqp.cs
@@ -12,8 +12,8 @@ public partial class MetaManager
 {
     public struct MetaManagerEqp : IDisposable
     {
-        public          ExpandedEqpFile?                       File          = null;
-        public readonly Dictionary< EqpManipulation, Mod.Mod > Manipulations = new();
+        public          ExpandedEqpFile?                   File          = null;
+        public readonly Dictionary< EqpManipulation, int > Manipulations = new();
 
         public MetaManagerEqp()
         { }
@@ -38,14 +38,10 @@ public partial class MetaManager
             Manipulations.Clear();
         }
 
-        public bool ApplyMod( EqpManipulation m, Mod.Mod mod )
+        public bool ApplyMod( EqpManipulation m, int modIdx )
         {
 #if USE_EQP
-            if( !Manipulations.TryAdd( m, mod ) )
-            {
-                return false;
-            }
-
+            Manipulations[ m ] = modIdx;
             File ??= new ExpandedEqpFile();
             return m.Apply( File );
 #else
diff --git a/Penumbra/Meta/Manager/MetaManager.Est.cs b/Penumbra/Meta/Manager/MetaManager.Est.cs
index f53d145d..c6901f2f 100644
--- a/Penumbra/Meta/Manager/MetaManager.Est.cs
+++ b/Penumbra/Meta/Manager/MetaManager.Est.cs
@@ -16,7 +16,7 @@ public partial class MetaManager
         public EstFile? BodyFile = null;
         public EstFile? HeadFile = null;
 
-        public readonly Dictionary< EstManipulation, Mod.Mod > Manipulations = new();
+        public readonly Dictionary< EstManipulation, int > Manipulations = new();
 
         public MetaManagerEst()
         { }
@@ -49,14 +49,10 @@ public partial class MetaManager
             Manipulations.Clear();
         }
 
-        public bool ApplyMod( EstManipulation m, Mod.Mod mod )
+        public bool ApplyMod( EstManipulation m, int modIdx )
         {
 #if USE_EST
-            if( !Manipulations.TryAdd( m, mod ) )
-            {
-                return false;
-            }
-
+            Manipulations[ m ] = modIdx;
             var file = m.Slot switch
             {
                 EstManipulation.EstType.Hair => HairFile ??= new EstFile( EstManipulation.EstType.Hair ),
diff --git a/Penumbra/Meta/Manager/MetaManager.Gmp.cs b/Penumbra/Meta/Manager/MetaManager.Gmp.cs
index 8f43ac00..4bdee5c3 100644
--- a/Penumbra/Meta/Manager/MetaManager.Gmp.cs
+++ b/Penumbra/Meta/Manager/MetaManager.Gmp.cs
@@ -12,8 +12,8 @@ public partial class MetaManager
 {
     public struct MetaManagerGmp : IDisposable
     {
-        public          ExpandedGmpFile?                       File          = null;
-        public readonly Dictionary< GmpManipulation, Mod.Mod > Manipulations = new();
+        public          ExpandedGmpFile?                   File          = null;
+        public readonly Dictionary< GmpManipulation, int > Manipulations = new();
 
         public MetaManagerGmp()
         { }
@@ -37,15 +37,11 @@ public partial class MetaManager
             }
         }
 
-        public bool ApplyMod( GmpManipulation m, Mod.Mod mod )
+        public bool ApplyMod( GmpManipulation m, int modIdx )
         {
 #if USE_GMP
-            if( !Manipulations.TryAdd( m, mod ) )
-            {
-                return false;
-            }
-
-            File ??= new ExpandedGmpFile();
+            Manipulations[ m ] =   modIdx;
+            File               ??= new ExpandedGmpFile();
             return m.Apply( File );
 #else
             return false;
diff --git a/Penumbra/Meta/Manager/MetaManager.Imc.cs b/Penumbra/Meta/Manager/MetaManager.Imc.cs
index 4e3d302a..2a6e3a37 100644
--- a/Penumbra/Meta/Manager/MetaManager.Imc.cs
+++ b/Penumbra/Meta/Manager/MetaManager.Imc.cs
@@ -3,14 +3,12 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using Dalamud.Logging;
 using FFXIVClientStructs.FFXIV.Client.System.Resource;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
 using Penumbra.GameData.Enums;
-using Penumbra.Interop.Loader;
-using Penumbra.Interop.Resolver;
 using Penumbra.Interop.Structs;
 using Penumbra.Meta.Files;
 using Penumbra.Meta.Manipulations;
-using Penumbra.Mods;
 
 namespace Penumbra.Meta.Manager;
 
@@ -18,14 +16,14 @@ public partial class MetaManager
 {
     public readonly struct MetaManagerImc : IDisposable
     {
-        public readonly Dictionary< Utf8GamePath, ImcFile >    Files         = new();
-        public readonly Dictionary< ImcManipulation, Mod.Mod > Manipulations = new();
+        public readonly Dictionary< Utf8GamePath, ImcFile > Files         = new();
+        public readonly Dictionary< ImcManipulation, int >  Manipulations = new();
 
-        private readonly ModCollection _collection;
-        private static   int           _imcManagerCount;
+        private readonly ModCollection2 _collection;
+        private static   int            _imcManagerCount;
 
 
-        public MetaManagerImc( ModCollection collection )
+        public MetaManagerImc( ModCollection2 collection )
         {
             _collection = collection;
             SetupDelegate();
@@ -34,37 +32,43 @@ public partial class MetaManager
         [Conditional( "USE_IMC" )]
         public void SetFiles()
         {
-            if( _collection.Cache == null )
+            if( !_collection.HasCache )
             {
                 return;
             }
 
             foreach( var path in Files.Keys )
             {
-                _collection.Cache.ResolvedFiles[ path ] = CreateImcPath( path );
+                _collection.ForceFile( path, CreateImcPath( path ) );
             }
         }
 
         [Conditional( "USE_IMC" )]
         public void Reset()
         {
-            foreach( var (path, file) in Files )
+            if( _collection.HasCache )
             {
-                _collection.Cache?.ResolvedFiles.Remove( path );
-                file.Reset();
+                foreach( var (path, file) in Files )
+                {
+                    _collection.RemoveFile( path );
+                    file.Reset();
+                }
+            }
+            else
+            {
+                foreach( var (_, file) in Files )
+                {
+                    file.Reset();
+                }
             }
 
             Manipulations.Clear();
         }
 
-        public bool ApplyMod( ImcManipulation m, Mod.Mod mod )
+        public bool ApplyMod( ImcManipulation m, int modIdx )
         {
 #if USE_IMC
-            if( !Manipulations.TryAdd( m, mod ) )
-            {
-                return false;
-            }
-
+            Manipulations[ m ] = modIdx;
             var path = m.GamePath();
             if( !Files.TryGetValue( path, out var file ) )
             {
@@ -78,9 +82,9 @@ public partial class MetaManager
 
             Files[ path ] = file;
             var fullPath = CreateImcPath( path );
-            if( _collection.Cache != null )
+            if( _collection.HasCache )
             {
-                _collection.Cache.ResolvedFiles[ path ] = fullPath;
+                _collection.ForceFile( path, fullPath );
             }
 
             return true;
@@ -135,8 +139,8 @@ public partial class MetaManager
             PluginLog.Verbose( "Using ImcLoadHandler for path {$Path:l}.", path );
             ret = Penumbra.ResourceLoader.ReadSqPackHook.Original( resourceManager, fileDescriptor, priority, isSync );
             if( Penumbra.CollectionManager.ByName( split.ToString(), out var collection )
-            && collection.Cache != null
-            && collection.Cache.MetaManipulations.Imc.Files.TryGetValue(
+            && collection.HasCache
+            && collection.MetaCache!.Imc.Files.TryGetValue(
                    Utf8GamePath.FromSpan( path.Span, out var p, false ) ? p : Utf8GamePath.Empty, out var file ) )
             {
                 PluginLog.Debug( "Loaded {GamePath:l} from file and replaced with IMC from collection {Collection:l}.", path,
@@ -152,9 +156,8 @@ public partial class MetaManager
         {
             // Only check imcs.
             if( resource->FileType != ResourceType.Imc
-            || resolveData is not ModCollection collection
-            || collection.Cache == null
-            || !collection.Cache.MetaManipulations.Imc.Files.TryGetValue( gamePath, out var file )
+            || resolveData is not ModCollection2 { HasCache: true } collection
+            || !collection.MetaCache!.Imc.Files.TryGetValue( gamePath, out var file )
             || !file.ChangesSinceLoad )
             {
                 return;
diff --git a/Penumbra/Meta/Manager/MetaManager.cs b/Penumbra/Meta/Manager/MetaManager.cs
index d0932ae4..0672d953 100644
--- a/Penumbra/Meta/Manager/MetaManager.cs
+++ b/Penumbra/Meta/Manager/MetaManager.cs
@@ -1,8 +1,8 @@
 using System;
 using System.Runtime.CompilerServices;
+using Penumbra.Collections;
 using Penumbra.Meta.Files;
 using Penumbra.Meta.Manipulations;
-using Penumbra.Mods;
 
 namespace Penumbra.Meta.Manager;
 
@@ -28,19 +28,19 @@ public partial class MetaManager : IDisposable
         }
     }
 
-    public bool TryGetValue( MetaManipulation manip, out Mod.Mod? mod )
+    public bool TryGetValue( MetaManipulation manip, out int modIdx )
     {
-        mod = manip.ManipulationType switch
+        modIdx = manip.ManipulationType switch
         {
-            MetaManipulation.Type.Eqp  => Eqp.Manipulations.TryGetValue( manip.Eqp, out var m ) ? m : null,
-            MetaManipulation.Type.Gmp  => Gmp.Manipulations.TryGetValue( manip.Gmp, out var m ) ? m : null,
-            MetaManipulation.Type.Eqdp => Eqdp.Manipulations.TryGetValue( manip.Eqdp, out var m ) ? m : null,
-            MetaManipulation.Type.Est  => Est.Manipulations.TryGetValue( manip.Est, out var m ) ? m : null,
-            MetaManipulation.Type.Rsp  => Cmp.Manipulations.TryGetValue( manip.Rsp, out var m ) ? m : null,
-            MetaManipulation.Type.Imc  => Imc.Manipulations.TryGetValue( manip.Imc, out var m ) ? m : null,
+            MetaManipulation.Type.Eqp  => Eqp.Manipulations.TryGetValue( manip.Eqp, out var m ) ? m : -1,
+            MetaManipulation.Type.Gmp  => Gmp.Manipulations.TryGetValue( manip.Gmp, out var m ) ? m : -1,
+            MetaManipulation.Type.Eqdp => Eqdp.Manipulations.TryGetValue( manip.Eqdp, out var m ) ? m : -1,
+            MetaManipulation.Type.Est  => Est.Manipulations.TryGetValue( manip.Est, out var m ) ? m : -1,
+            MetaManipulation.Type.Rsp  => Cmp.Manipulations.TryGetValue( manip.Rsp, out var m ) ? m : -1,
+            MetaManipulation.Type.Imc  => Imc.Manipulations.TryGetValue( manip.Imc, out var m ) ? m : -1,
             _                          => throw new ArgumentOutOfRangeException(),
         };
-        return mod != null;
+        return modIdx != -1;
     }
 
     public int Count
@@ -51,7 +51,7 @@ public partial class MetaManager : IDisposable
           + Est.Manipulations.Count
           + Eqp.Manipulations.Count;
 
-    public MetaManager( ModCollection collection )
+    public MetaManager( ModCollection2 collection )
         => Imc = new MetaManagerImc( collection );
 
     public void SetFiles()
@@ -84,16 +84,16 @@ public partial class MetaManager : IDisposable
         Imc.Dispose();
     }
 
-    public bool ApplyMod( MetaManipulation m, Mod.Mod mod )
+    public bool ApplyMod( MetaManipulation m, int modIdx )
     {
         return m.ManipulationType switch
         {
-            MetaManipulation.Type.Eqp     => Eqp.ApplyMod( m.Eqp, mod ),
-            MetaManipulation.Type.Gmp     => Gmp.ApplyMod( m.Gmp, mod ),
-            MetaManipulation.Type.Eqdp    => Eqdp.ApplyMod( m.Eqdp, mod ),
-            MetaManipulation.Type.Est     => Est.ApplyMod( m.Est, mod ),
-            MetaManipulation.Type.Rsp     => Cmp.ApplyMod( m.Rsp, mod ),
-            MetaManipulation.Type.Imc     => Imc.ApplyMod( m.Imc, mod ),
+            MetaManipulation.Type.Eqp     => Eqp.ApplyMod( m.Eqp, modIdx ),
+            MetaManipulation.Type.Gmp     => Gmp.ApplyMod( m.Gmp, modIdx ),
+            MetaManipulation.Type.Eqdp    => Eqdp.ApplyMod( m.Eqdp, modIdx ),
+            MetaManipulation.Type.Est     => Est.ApplyMod( m.Est, modIdx ),
+            MetaManipulation.Type.Rsp     => Cmp.ApplyMod( m.Rsp, modIdx ),
+            MetaManipulation.Type.Imc     => Imc.ApplyMod( m.Imc, modIdx ),
             MetaManipulation.Type.Unknown => false,
             _                             => false,
         };
diff --git a/Penumbra/MigrateConfiguration.cs b/Penumbra/MigrateConfiguration.cs
index 2f4fd5a7..742b1d5d 100644
--- a/Penumbra/MigrateConfiguration.cs
+++ b/Penumbra/MigrateConfiguration.cs
@@ -4,6 +4,7 @@ using System.IO;
 using System.Linq;
 using Dalamud.Logging;
 using Newtonsoft.Json.Linq;
+using Penumbra.Collections;
 using Penumbra.Mod;
 using Penumbra.Mods;
 
@@ -33,8 +34,8 @@ public static class MigrateConfiguration
             return;
         }
 
-        var defaultCollection     = new ModCollection();
-        var defaultCollectionFile = defaultCollection.FileName();
+        var defaultCollection     = ModCollection2.CreateNewEmpty( ModCollection2.DefaultCollection );
+        var defaultCollectionFile = defaultCollection.FileName;
         if( defaultCollectionFile.Exists )
         {
             return;
@@ -46,6 +47,7 @@ public static class MigrateConfiguration
             var data = JArray.Parse( text );
 
             var maxPriority = 0;
+            var dict        = new Dictionary< string, ModSettings >();
             foreach( var setting in data.Cast< JObject >() )
             {
                 var modName  = ( string )setting[ "FolderName" ]!;
@@ -54,24 +56,25 @@ public static class MigrateConfiguration
                 var settings = setting[ "Settings" ]!.ToObject< Dictionary< string, int > >()
                  ?? setting[ "Conf" ]!.ToObject< Dictionary< string, int > >();
 
-                var save = new ModSettings()
+                dict[ modName ] = new ModSettings()
                 {
                     Enabled  = enabled,
                     Priority = priority,
                     Settings = settings!,
                 };
-                defaultCollection.Settings.Add( modName, save );
+                ;
                 maxPriority = Math.Max( maxPriority, priority );
             }
 
             if( !config.InvertModListOrder )
             {
-                foreach( var setting in defaultCollection.Settings.Values )
+                foreach( var setting in dict.Values )
                 {
                     setting.Priority = maxPriority - setting.Priority;
                 }
             }
 
+            defaultCollection = ModCollection2.MigrateFromV0( ModCollection2.DefaultCollection, dict );
             defaultCollection.Save();
         }
         catch( Exception e )
diff --git a/Penumbra/Mod/ModCache.cs b/Penumbra/Mod/ModCache.cs
index 6fc6486c..80e7451c 100644
--- a/Penumbra/Mod/ModCache.cs
+++ b/Penumbra/Mod/ModCache.cs
@@ -6,7 +6,7 @@ using Penumbra.Meta.Manipulations;
 
 namespace Penumbra.Mod;
 
-public struct ModCache2
+public struct ConflictCache
 {
     public readonly struct ModCacheStruct : IComparable< ModCacheStruct >
     {
diff --git a/Penumbra/Mod/ModCleanup.cs b/Penumbra/Mod/ModCleanup.cs
index 38c316e2..654c2174 100644
--- a/Penumbra/Mod/ModCleanup.cs
+++ b/Penumbra/Mod/ModCleanup.cs
@@ -9,6 +9,7 @@ using Dalamud.Logging;
 using Penumbra.GameData.ByteString;
 using Penumbra.Importer;
 using Penumbra.Mods;
+using Penumbra.Util;
 
 namespace Penumbra.Mod;
 
@@ -60,8 +61,8 @@ public class ModCleanup
 
     private static ModData CreateNewMod( DirectoryInfo newDir, string newSortOrder )
     {
-        var idx = Penumbra.ModManager.AddMod( newDir );
-        var newMod = Penumbra.ModManager.Mods[idx];
+        var idx    = Penumbra.ModManager.AddMod( newDir );
+        var newMod = Penumbra.ModManager.Mods[ idx ];
         newMod.Move( newSortOrder );
         newMod.ComputeChangedItems();
         ModFileSystem.InvokeChange();
@@ -509,21 +510,23 @@ public class ModCleanup
                     }
                 }
 
-                if( option.OptionFiles.Any() )
+                if( option.OptionFiles.Count > 0 )
                 {
                     group.Options.Add( option );
                 }
             }
 
-            if( group.Options.Any() )
+            if( group.Options.Count > 0 )
             {
                 meta.Groups.Add( groupDir.Name, group );
             }
         }
 
-        foreach( var collection in Penumbra.CollectionManager.Collections )
+        // TODO
+        var idx = Penumbra.ModManager.Mods.IndexOf( m => m.Meta == meta );
+        foreach( var collection in Penumbra.CollectionManager )
         {
-            collection.UpdateSetting( baseDir, meta, true );
+            collection.Settings[ idx ]?.FixInvalidSettings( meta );
         }
     }
 }
\ No newline at end of file
diff --git a/Penumbra/Mods/CollectionManager.cs b/Penumbra/Mods/CollectionManager.cs
deleted file mode 100644
index a00b01be..00000000
--- a/Penumbra/Mods/CollectionManager.cs
+++ /dev/null
@@ -1,574 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.IO;
-using System.Linq;
-using Dalamud.Logging;
-using Penumbra.Mod;
-using Penumbra.Util;
-
-namespace Penumbra.Mods;
-
-public sealed class CollectionManager2 : IDisposable, IEnumerable< ModCollection2 >
-{
-    private readonly ModManager _modManager;
-
-    private readonly List< ModCollection2 > _collections = new();
-
-    public ModCollection2 this[ int idx ]
-        => _collections[ idx ];
-
-    public ModCollection2? this[ string name ]
-        => ByName( name, out var c ) ? c : null;
-
-    public ModCollection2 Default
-        => this[ ModCollection2.DefaultCollection ]!;
-
-    public bool ByName( string name, [NotNullWhen( true )] out ModCollection2? collection )
-        => _collections.FindFirst( c => c.Name == name, out collection );
-
-    public IEnumerator< ModCollection2 > GetEnumerator()
-        => _collections.GetEnumerator();
-
-    IEnumerator IEnumerable.GetEnumerator()
-        => GetEnumerator();
-
-    public CollectionManager2( ModManager manager )
-    {
-        _modManager = manager;
-
-        //_modManager.ModsRediscovered += OnModsRediscovered;
-        //_modManager.ModChange        += OnModChanged;
-        ReadCollections();
-        //LoadConfigCollections( Penumbra.Config );
-    }
-
-    public void Dispose()
-    { }
-
-    private void AddDefaultCollection()
-    {
-        if( this[ ModCollection.DefaultCollection ] != null )
-        {
-            return;
-        }
-
-        var defaultCollection = ModCollection2.CreateNewEmpty( ModCollection2.DefaultCollection );
-        defaultCollection.Save();
-        _collections.Add( defaultCollection );
-    }
-
-    private void ApplyInheritancesAndFixSettings( IEnumerable< IReadOnlyList< string > > inheritances )
-    {
-        foreach( var (collection, inheritance) in this.Zip( inheritances ) )
-        {
-            var changes = false;
-            foreach( var subCollectionName in inheritance )
-            {
-                if( !ByName( subCollectionName, out var subCollection ) )
-                {
-                    changes = true;
-                    PluginLog.Warning( $"Inherited collection {subCollectionName} for {collection.Name} does not exist, removed." );
-                }
-                else if( !collection.AddInheritance( subCollection ) )
-                {
-                    changes = true;
-                    PluginLog.Warning( $"{collection.Name} can not inherit from {subCollectionName}, removed." );
-                }
-            }
-
-            foreach( var (setting, mod) in collection.Settings.Zip( Penumbra.ModManager.Mods ).Where( s => s.First != null ) )
-            {
-                changes |= setting!.FixInvalidSettings( mod.Meta );
-            }
-
-            if( changes )
-            {
-                collection.Save();
-            }
-        }
-    }
-
-    private void ReadCollections()
-    {
-        var collectionDir = new DirectoryInfo( ModCollection2.CollectionDirectory );
-        var inheritances  = new List< IReadOnlyList< string > >();
-        if( collectionDir.Exists )
-        {
-            foreach( var file in collectionDir.EnumerateFiles( "*.json" ) )
-            {
-                var collection = ModCollection2.LoadFromFile( file, out var inheritance );
-                if( collection == null || collection.Name.Length == 0 )
-                {
-                    continue;
-                }
-
-                if( file.Name != $"{collection.Name.RemoveInvalidPathSymbols()}.json" )
-                {
-                    PluginLog.Warning( $"Collection {file.Name} does not correspond to {collection.Name}." );
-                }
-
-                if( this[ collection.Name ] != null )
-                {
-                    PluginLog.Warning( $"Duplicate collection found: {collection.Name} already exists." );
-                }
-                else
-                {
-                    inheritances.Add( inheritance );
-                    _collections.Add( collection );
-                }
-            }
-        }
-
-        AddDefaultCollection();
-        ApplyInheritancesAndFixSettings( inheritances );
-    }
-}
-
-public enum CollectionType : byte
-{
-    Inactive,
-    Default,
-    Forced,
-    Character,
-    Current,
-}
-
-public delegate void CollectionChangeDelegate( ModCollection? oldCollection, ModCollection? newCollection, CollectionType type,
-    string? characterName = null );
-
-// Contains all collections and respective functions, as well as the collection settings.
-public sealed class CollectionManager : IDisposable
-{
-    private readonly ModManager _manager;
-
-    public List< ModCollection > Collections { get; } = new();
-    public Dictionary< string, ModCollection > CharacterCollection { get; } = new();
-
-    public ModCollection CurrentCollection { get; private set; } = ModCollection.Empty;
-    public ModCollection DefaultCollection { get; private set; } = ModCollection.Empty;
-    public ModCollection ForcedCollection { get; private set; } = ModCollection.Empty;
-
-    public bool IsActive( ModCollection collection )
-        => ReferenceEquals( collection, DefaultCollection ) || ReferenceEquals( collection, ForcedCollection );
-
-    public ModCollection Default
-        => ByName( ModCollection.DefaultCollection )!;
-
-    public ModCollection? ByName( string name )
-        => name.Length > 0
-            ? Collections.Find( c => string.Equals( c.Name, name, StringComparison.InvariantCultureIgnoreCase ) )
-            : ModCollection.Empty;
-
-    public bool ByName( string name, [NotNullWhen( true )] out ModCollection? collection )
-    {
-        if( name.Length > 0 )
-        {
-            return Collections.FindFirst( c => string.Equals( c.Name, name, StringComparison.InvariantCultureIgnoreCase ), out collection );
-        }
-
-        collection = ModCollection.Empty;
-        return true;
-    }
-
-    // Is invoked after the collections actually changed.
-    public event CollectionChangeDelegate? CollectionChanged;
-
-    public CollectionManager( ModManager manager )
-    {
-        _manager = manager;
-
-        _manager.ModsRediscovered += OnModsRediscovered;
-        _manager.ModChange        += OnModChanged;
-        ReadCollections();
-        LoadConfigCollections( Penumbra.Config );
-    }
-
-    public void Dispose()
-    {
-        _manager.ModsRediscovered -= OnModsRediscovered;
-        _manager.ModChange        -= OnModChanged;
-    }
-
-    private void OnModsRediscovered()
-    {
-        RecreateCaches();
-        DefaultCollection.SetFiles();
-    }
-
-    private void OnModChanged( ModChangeType type, int idx, ModData mod )
-    {
-        switch( type )
-        {
-            case ModChangeType.Added:
-                foreach( var collection in Collections )
-                {
-                    collection.AddMod( mod );
-                }
-
-                break;
-            case ModChangeType.Removed:
-                RemoveModFromCaches( mod.BasePath );
-                break;
-            case ModChangeType.Changed:
-                // TODO
-                break;
-            default: throw new ArgumentOutOfRangeException( nameof( type ), type, null );
-        }
-    }
-
-    public void CreateNecessaryCaches()
-    {
-        AddCache( DefaultCollection );
-        AddCache( ForcedCollection );
-        foreach( var (_, collection) in CharacterCollection )
-        {
-            AddCache( collection );
-        }
-    }
-
-    public void RecreateCaches()
-    {
-        foreach( var collection in Collections.Where( c => c.Cache != null ) )
-        {
-            collection.CreateCache( _manager.StructuredMods.AllMods( _manager.Config.SortFoldersFirst ) );
-        }
-
-        CreateNecessaryCaches();
-    }
-
-    public void RemoveModFromCaches( DirectoryInfo modDir )
-    {
-        foreach( var collection in Collections )
-        {
-            collection.Cache?.RemoveMod( modDir );
-        }
-    }
-
-    internal void UpdateCollections( ModData mod, bool metaChanges, ResourceChange fileChanges, bool nameChange, bool reloadMeta )
-    {
-        foreach( var collection in Collections )
-        {
-            if( metaChanges )
-            {
-                collection.UpdateSetting( mod );
-            }
-
-            if( fileChanges.HasFlag( ResourceChange.Files )
-            && collection.Settings.TryGetValue( mod.BasePath.Name, out var settings )
-            && settings.Enabled )
-            {
-                collection.Cache?.CalculateEffectiveFileList();
-            }
-
-            if( reloadMeta )
-            {
-                collection.Cache?.UpdateMetaManipulations();
-            }
-        }
-
-        if( reloadMeta && DefaultCollection.Settings.TryGetValue( mod.BasePath.Name, out var config ) && config.Enabled )
-        {
-            Penumbra.ResidentResources.Reload();
-        }
-    }
-
-    public bool AddCollection( string name, Dictionary< string, ModSettings > settings )
-    {
-        var nameFixed = name.RemoveInvalidPathSymbols().ToLowerInvariant();
-        if( nameFixed.Length == 0 || Collections.Any( c => c.Name.RemoveInvalidPathSymbols().ToLowerInvariant() == nameFixed ) )
-        {
-            PluginLog.Warning( $"The new collection {name} would lead to the same path as one that already exists." );
-            return false;
-        }
-
-        var newCollection = new ModCollection( name, settings );
-        Collections.Add( newCollection );
-        newCollection.Save();
-        CollectionChanged?.Invoke( null, newCollection, CollectionType.Inactive );
-        SetCollection( newCollection, CollectionType.Current );
-        return true;
-    }
-
-    public bool RemoveCollection( string name )
-    {
-        if( name == ModCollection.DefaultCollection )
-        {
-            PluginLog.Error( "Can not remove the default collection." );
-            return false;
-        }
-
-        var idx = Collections.IndexOf( c => c.Name == name );
-        if( idx < 0 )
-        {
-            return false;
-        }
-
-        var collection = Collections[ idx ];
-
-        if( CurrentCollection == collection )
-        {
-            SetCollection( Default, CollectionType.Current );
-        }
-
-        if( ForcedCollection == collection )
-        {
-            SetCollection( ModCollection.Empty, CollectionType.Forced );
-        }
-
-        if( DefaultCollection == collection )
-        {
-            SetCollection( ModCollection.Empty, CollectionType.Default );
-        }
-
-        foreach( var (characterName, characterCollection) in CharacterCollection.ToArray() )
-        {
-            if( characterCollection == collection )
-            {
-                SetCollection( ModCollection.Empty, CollectionType.Character, characterName );
-            }
-        }
-
-        collection.Delete();
-        Collections.RemoveAt( idx );
-        CollectionChanged?.Invoke( collection, null, CollectionType.Inactive );
-        return true;
-    }
-
-    private void AddCache( ModCollection collection )
-    {
-        if( collection.Cache == null && collection.Name != string.Empty )
-        {
-            collection.CreateCache( _manager.StructuredMods.AllMods( _manager.Config.SortFoldersFirst ) );
-        }
-    }
-
-    private void RemoveCache( ModCollection collection )
-    {
-        if( collection.Name != ForcedCollection.Name
-        && collection.Name  != CurrentCollection.Name
-        && collection.Name  != DefaultCollection.Name
-        && CharacterCollection.All( kvp => kvp.Value.Name != collection.Name ) )
-        {
-            collection.ClearCache();
-        }
-    }
-
-    public void SetCollection( ModCollection newCollection, CollectionType type, string? characterName = null )
-    {
-        var oldCollection = type switch
-        {
-            CollectionType.Default => DefaultCollection,
-            CollectionType.Forced  => ForcedCollection,
-            CollectionType.Current => CurrentCollection,
-            CollectionType.Character => characterName?.Length > 0
-                ? CharacterCollection.TryGetValue( characterName, out var c )
-                    ? c
-                    : ModCollection.Empty
-                : null,
-            _ => null,
-        };
-
-        if( oldCollection == null || newCollection.Name == oldCollection.Name )
-        {
-            return;
-        }
-
-        AddCache( newCollection );
-        RemoveCache( oldCollection );
-        switch( type )
-        {
-            case CollectionType.Default:
-                DefaultCollection                 = newCollection;
-                Penumbra.Config.DefaultCollection = newCollection.Name;
-                Penumbra.ResidentResources.Reload();
-                DefaultCollection.SetFiles();
-                break;
-            case CollectionType.Forced:
-                ForcedCollection                 = newCollection;
-                Penumbra.Config.ForcedCollection = newCollection.Name;
-                Penumbra.ResidentResources.Reload();
-                break;
-            case CollectionType.Current:
-                CurrentCollection                 = newCollection;
-                Penumbra.Config.CurrentCollection = newCollection.Name;
-                break;
-            case CollectionType.Character:
-                CharacterCollection[ characterName! ]                  = newCollection;
-                Penumbra.Config.CharacterCollections[ characterName! ] = newCollection.Name;
-                break;
-        }
-
-        CollectionChanged?.Invoke( oldCollection, newCollection, type, characterName );
-
-        Penumbra.Config.Save();
-    }
-
-    public bool CreateCharacterCollection( string characterName )
-    {
-        if( CharacterCollection.ContainsKey( characterName ) )
-        {
-            return false;
-        }
-
-        CharacterCollection[ characterName ]                  = ModCollection.Empty;
-        Penumbra.Config.CharacterCollections[ characterName ] = string.Empty;
-        Penumbra.Config.Save();
-        CollectionChanged?.Invoke( null, ModCollection.Empty, CollectionType.Character, characterName );
-        return true;
-    }
-
-    public void RemoveCharacterCollection( string characterName )
-    {
-        if( CharacterCollection.TryGetValue( characterName, out var collection ) )
-        {
-            RemoveCache( collection );
-            CharacterCollection.Remove( characterName );
-            CollectionChanged?.Invoke( collection, null, CollectionType.Character, characterName );
-        }
-
-        if( Penumbra.Config.CharacterCollections.Remove( characterName ) )
-        {
-            Penumbra.Config.Save();
-        }
-    }
-
-    private bool LoadCurrentCollection( Configuration config )
-    {
-        if( ByName( config.CurrentCollection, out var currentCollection ) )
-        {
-            CurrentCollection = currentCollection;
-            AddCache( CurrentCollection );
-            return false;
-        }
-
-        PluginLog.Error( $"Last choice of CurrentCollection {config.CurrentCollection} is not available, reset to Default." );
-        CurrentCollection = Default;
-        if( CurrentCollection.Cache == null )
-        {
-            CurrentCollection.CreateCache( _manager.StructuredMods.AllMods( _manager.Config.SortFoldersFirst ) );
-        }
-
-        config.CurrentCollection = ModCollection.DefaultCollection;
-        return true;
-    }
-
-    private bool LoadForcedCollection( Configuration config )
-    {
-        if( config.ForcedCollection.Length == 0 )
-        {
-            ForcedCollection = ModCollection.Empty;
-            return false;
-        }
-
-        if( ByName( config.ForcedCollection, out var forcedCollection ) )
-        {
-            ForcedCollection = forcedCollection;
-            AddCache( ForcedCollection );
-            return false;
-        }
-
-        PluginLog.Error( $"Last choice of ForcedCollection {config.ForcedCollection} is not available, reset to None." );
-        ForcedCollection        = ModCollection.Empty;
-        config.ForcedCollection = string.Empty;
-        return true;
-    }
-
-    private bool LoadDefaultCollection( Configuration config )
-    {
-        if( config.DefaultCollection.Length == 0 )
-        {
-            DefaultCollection = ModCollection.Empty;
-            return false;
-        }
-
-        if( ByName( config.DefaultCollection, out var defaultCollection ) )
-        {
-            DefaultCollection = defaultCollection;
-            AddCache( DefaultCollection );
-            return false;
-        }
-
-        PluginLog.Error( $"Last choice of DefaultCollection {config.DefaultCollection} is not available, reset to None." );
-        DefaultCollection        = ModCollection.Empty;
-        config.DefaultCollection = string.Empty;
-        return true;
-    }
-
-    private bool LoadCharacterCollections( Configuration config )
-    {
-        var configChanged = false;
-        foreach( var (player, collectionName) in config.CharacterCollections.ToArray() )
-        {
-            if( collectionName.Length == 0 )
-            {
-                CharacterCollection.Add( player, ModCollection.Empty );
-            }
-            else if( ByName( collectionName, out var charCollection ) )
-            {
-                AddCache( charCollection );
-                CharacterCollection.Add( player, charCollection );
-            }
-            else
-            {
-                PluginLog.Error( $"Last choice of <{player}>'s Collection {collectionName} is not available, reset to None." );
-                CharacterCollection.Add( player, ModCollection.Empty );
-                config.CharacterCollections[ player ] = string.Empty;
-                configChanged                         = true;
-            }
-        }
-
-        return configChanged;
-    }
-
-    private void LoadConfigCollections( Configuration config )
-    {
-        var configChanged = LoadCurrentCollection( config );
-        configChanged |= LoadDefaultCollection( config );
-        configChanged |= LoadForcedCollection( config );
-        configChanged |= LoadCharacterCollections( config );
-
-        if( configChanged )
-        {
-            config.Save();
-        }
-    }
-
-    private void ReadCollections()
-    {
-        var collectionDir = ModCollection.CollectionDir();
-        if( collectionDir.Exists )
-        {
-            foreach( var file in collectionDir.EnumerateFiles( "*.json" ) )
-            {
-                var collection = ModCollection.LoadFromFile( file );
-                if( collection == null || collection.Name == string.Empty )
-                {
-                    continue;
-                }
-
-                if( file.Name != $"{collection.Name.RemoveInvalidPathSymbols()}.json" )
-                {
-                    PluginLog.Warning( $"Collection {file.Name} does not correspond to {collection.Name}." );
-                }
-
-                if( ByName( collection.Name ) != null )
-                {
-                    PluginLog.Warning( $"Duplicate collection found: {collection.Name} already exists." );
-                }
-                else
-                {
-                    Collections.Add( collection );
-                }
-            }
-        }
-
-        if( ByName( ModCollection.DefaultCollection ) == null )
-        {
-            var defaultCollection = new ModCollection();
-            defaultCollection.Save();
-            Collections.Add( defaultCollection );
-        }
-    }
-}
\ No newline at end of file
diff --git a/Penumbra/Mods/ModCollection.cs b/Penumbra/Mods/ModCollection.cs
deleted file mode 100644
index 9a00250b..00000000
--- a/Penumbra/Mods/ModCollection.cs
+++ /dev/null
@@ -1,523 +0,0 @@
-using Newtonsoft.Json;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
-using System.Text;
-using Dalamud.Logging;
-using Newtonsoft.Json.Linq;
-using Penumbra.GameData.ByteString;
-using Penumbra.Meta.Manager;
-using Penumbra.Mod;
-using Penumbra.Util;
-
-namespace Penumbra.Mods;
-
-public partial class ModCollection2
-{
-    public const int    CurrentVersion    = 1;
-    public const string DefaultCollection = "Default";
-
-    public string Name { get; private init; }
-    public int Version { get; private set; }
-
-    private readonly List< ModSettings? > _settings;
-
-    public IReadOnlyList< ModSettings? > Settings
-        => _settings;
-
-    public IEnumerable< ModSettings? > ActualSettings
-        => Enumerable.Range( 0, _settings.Count ).Select( i => this[ i ].Settings );
-
-    private readonly Dictionary< string, ModSettings > _unusedSettings;
-
-    private ModCollection2( string name, ModCollection2 duplicate )
-    {
-        Name               =  name;
-        Version            =  duplicate.Version;
-        _settings          =  duplicate._settings.ConvertAll( s => s?.DeepCopy() );
-        _unusedSettings    =  duplicate._unusedSettings.ToDictionary( kvp => kvp.Key, kvp => kvp.Value.DeepCopy() );
-        _inheritance       =  duplicate._inheritance.ToList();
-        ModSettingChanged  += SaveOnChange;
-        InheritanceChanged += Save;
-    }
-
-    private ModCollection2( string name, int version, Dictionary< string, ModSettings > allSettings )
-    {
-        Name            = name;
-        Version         = version;
-        _unusedSettings = allSettings;
-        _settings       = Enumerable.Repeat( ( ModSettings? )null, Penumbra.ModManager.Count ).ToList();
-        for( var i = 0; i < Penumbra.ModManager.Count; ++i )
-        {
-            var modName = Penumbra.ModManager[ i ].BasePath.Name;
-            if( _unusedSettings.TryGetValue( Penumbra.ModManager[ i ].BasePath.Name, out var settings ) )
-            {
-                _unusedSettings.Remove( modName );
-                _settings[ i ] = settings;
-            }
-        }
-
-        Migration.Migrate( this );
-        ModSettingChanged  += SaveOnChange;
-        InheritanceChanged += Save;
-    }
-
-    public static ModCollection2 CreateNewEmpty( string name )
-        => new(name, CurrentVersion, new Dictionary< string, ModSettings >());
-
-    public ModCollection2 Duplicate( string name )
-        => new(name, this);
-
-    private void CleanUnavailableSettings()
-    {
-        var any = _unusedSettings.Count > 0;
-        _unusedSettings.Clear();
-        if( any )
-        {
-            Save();
-        }
-    }
-
-    public void AddMod( ModData mod )
-    {
-        if( _unusedSettings.TryGetValue( mod.BasePath.Name, out var settings ) )
-        {
-            _settings.Add( settings );
-            _unusedSettings.Remove( mod.BasePath.Name );
-        }
-        else
-        {
-            _settings.Add( null );
-        }
-    }
-
-    public void RemoveMod( ModData mod, int idx )
-    {
-        var settings = _settings[ idx ];
-        if( settings != null )
-        {
-            _unusedSettings.Add( mod.BasePath.Name, settings );
-        }
-
-        _settings.RemoveAt( idx );
-    }
-
-    public static string CollectionDirectory
-        => Path.Combine( Dalamud.PluginInterface.GetPluginConfigDirectory(), "collections" );
-
-    private FileInfo FileName
-        => new(Path.Combine( CollectionDirectory, $"{Name.RemoveInvalidPathSymbols()}.json" ));
-
-    public void Save()
-    {
-        try
-        {
-            var file = FileName;
-            file.Directory?.Create();
-            using var s = file.Open( FileMode.Truncate );
-            using var w = new StreamWriter( s, Encoding.UTF8 );
-            using var j = new JsonTextWriter( w );
-            j.Formatting = Formatting.Indented;
-            var x = JsonSerializer.Create( new JsonSerializerSettings { Formatting = Formatting.Indented } );
-            j.WriteStartObject();
-            j.WritePropertyName( nameof( Version ) );
-            j.WriteValue( Version );
-            j.WritePropertyName( nameof( Name ) );
-            j.WriteValue( Name );
-            j.WritePropertyName( nameof( Settings ) );
-            j.WriteStartObject();
-            for( var i = 0; i < _settings.Count; ++i )
-            {
-                var settings = _settings[ i ];
-                if( settings != null )
-                {
-                    j.WritePropertyName( Penumbra.ModManager[ i ].BasePath.Name );
-                    x.Serialize( j, settings );
-                }
-            }
-
-            foreach( var settings in _unusedSettings )
-            {
-                j.WritePropertyName( settings.Key );
-                x.Serialize( j, settings.Value );
-            }
-
-            j.WriteEndObject();
-            j.WritePropertyName( nameof( Inheritance ) );
-            x.Serialize( j, Inheritance );
-            j.WriteEndObject();
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Could not save collection {Name}:\n{e}" );
-        }
-    }
-
-    public void Delete()
-    {
-        var file = FileName;
-        if( file.Exists )
-        {
-            try
-            {
-                file.Delete();
-            }
-            catch( Exception e )
-            {
-                PluginLog.Error( $"Could not delete collection file {file.FullName} for {Name}:\n{e}" );
-            }
-        }
-    }
-
-    public static ModCollection2? LoadFromFile( FileInfo file, out IReadOnlyList< string > inheritance )
-    {
-        inheritance = Array.Empty< string >();
-        if( !file.Exists )
-        {
-            PluginLog.Error( $"Could not read collection because {file.FullName} does not exist." );
-            return null;
-        }
-
-        try
-        {
-            var obj     = JObject.Parse( File.ReadAllText( file.FullName ) );
-            var name    = obj[ nameof( Name ) ]?.ToObject< string >() ?? string.Empty;
-            var version = obj[ nameof( Version ) ]?.ToObject< int >() ?? 0;
-            var settings = obj[ nameof( Settings ) ]?.ToObject< Dictionary< string, ModSettings > >()
-             ?? new Dictionary< string, ModSettings >();
-            inheritance = obj[ nameof( Inheritance ) ]?.ToObject< List< string > >() ?? ( IReadOnlyList< string > )Array.Empty< string >();
-
-            return new ModCollection2( name, version, settings );
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Could not read collection information from {file.FullName}:\n{e}" );
-        }
-
-        return null;
-    }
-}
-
-// A ModCollection is a named set of ModSettings to all of the users' installed mods.
-// It is meant to be local only, and thus should always contain settings for every mod, not just the enabled ones.
-// Settings to mods that are not installed anymore are kept as long as no call to CleanUnavailableSettings is made.
-// Active ModCollections build a cache of currently relevant data.
-public class ModCollection
-{
-    public const string DefaultCollection = "Default";
-
-    public string Name { get; set; }
-
-    public Dictionary< string, ModSettings > Settings { get; }
-
-    public ModCollection()
-    {
-        Name     = DefaultCollection;
-        Settings = new Dictionary< string, ModSettings >();
-    }
-
-    public ModCollection( string name, Dictionary< string, ModSettings > settings )
-    {
-        Name     = name;
-        Settings = settings.ToDictionary( kvp => kvp.Key, kvp => kvp.Value.DeepCopy() );
-    }
-
-    public Mod.Mod GetMod( ModData mod )
-    {
-        if( Cache != null && Cache.AvailableMods.TryGetValue( mod.BasePath.Name, out var ret ) )
-        {
-            return ret;
-        }
-
-        if( Settings.TryGetValue( mod.BasePath.Name, out var settings ) )
-        {
-            return new Mod.Mod( settings, mod );
-        }
-
-        var newSettings = ModSettings.DefaultSettings( mod.Meta );
-        Settings.Add( mod.BasePath.Name, newSettings );
-        Save();
-        return new Mod.Mod( newSettings, mod );
-    }
-
-    private bool CleanUnavailableSettings( Dictionary< string, ModData > data )
-    {
-        var removeList = Settings.Where( settingKvp => !data.ContainsKey( settingKvp.Key ) ).ToArray();
-
-        foreach( var s in removeList )
-        {
-            Settings.Remove( s.Key );
-        }
-
-        return removeList.Length > 0;
-    }
-
-    public void CreateCache( IEnumerable< ModData > data )
-    {
-        Cache = new ModCollectionCache( this );
-        var changedSettings = false;
-        foreach( var mod in data )
-        {
-            if( Settings.TryGetValue( mod.BasePath.Name, out var settings ) )
-            {
-                Cache.AddMod( settings, mod, false );
-            }
-            else
-            {
-                changedSettings = true;
-                var newSettings = ModSettings.DefaultSettings( mod.Meta );
-                Settings.Add( mod.BasePath.Name, newSettings );
-                Cache.AddMod( newSettings, mod, false );
-            }
-        }
-
-        if( changedSettings )
-        {
-            Save();
-        }
-
-        CalculateEffectiveFileList( true, false );
-    }
-
-    public void ClearCache()
-        => Cache = null;
-
-    public void UpdateSetting( DirectoryInfo modPath, ModMeta meta, bool clear )
-    {
-        if( !Settings.TryGetValue( modPath.Name, out var settings ) )
-        {
-            return;
-        }
-
-        if( clear )
-        {
-            settings.Settings.Clear();
-        }
-
-        if( settings.FixInvalidSettings( meta ) )
-        {
-            Save();
-        }
-    }
-
-    public void UpdateSetting( ModData mod )
-        => UpdateSetting( mod.BasePath, mod.Meta, false );
-
-    public void UpdateSettings( bool forceSave )
-    {
-        if( Cache == null )
-        {
-            return;
-        }
-
-        var changes = false;
-        foreach( var mod in Cache.AvailableMods.Values )
-        {
-            changes |= mod.FixSettings();
-        }
-
-        if( forceSave || changes )
-        {
-            Save();
-        }
-    }
-
-    public void CalculateEffectiveFileList( bool withMetaManipulations, bool reloadResident )
-    {
-        PluginLog.Debug( "Recalculating effective file list for {CollectionName} [{WithMetaManipulations}]", Name, withMetaManipulations );
-        Cache ??= new ModCollectionCache( this );
-        UpdateSettings( false );
-        Cache.CalculateEffectiveFileList();
-        if( withMetaManipulations )
-        {
-            Cache.UpdateMetaManipulations();
-        }
-
-        if( reloadResident )
-        {
-            Penumbra.ResidentResources.Reload();
-        }
-    }
-
-
-    [JsonIgnore]
-    public ModCollectionCache? Cache { get; private set; }
-
-    public static ModCollection? LoadFromFile( FileInfo file )
-    {
-        if( !file.Exists )
-        {
-            PluginLog.Error( $"Could not read collection because {file.FullName} does not exist." );
-            return null;
-        }
-
-        try
-        {
-            var collection = JsonConvert.DeserializeObject< ModCollection >( File.ReadAllText( file.FullName ) );
-            return collection;
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Could not read collection information from {file.FullName}:\n{e}" );
-        }
-
-        return null;
-    }
-
-    private void SaveToFile( FileInfo file )
-    {
-        try
-        {
-            File.WriteAllText( file.FullName, JsonConvert.SerializeObject( this, Formatting.Indented ) );
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Could not write collection {Name} to {file.FullName}:\n{e}" );
-        }
-    }
-
-    public static DirectoryInfo CollectionDir()
-        => new(Path.Combine( Dalamud.PluginInterface.GetPluginConfigDirectory(), "collections" ));
-
-    private static FileInfo FileName( DirectoryInfo collectionDir, string name )
-        => new(Path.Combine( collectionDir.FullName, $"{name.RemoveInvalidPathSymbols()}.json" ));
-
-    public FileInfo FileName()
-        => new(Path.Combine( Dalamud.PluginInterface.GetPluginConfigDirectory(),
-            $"{Name.RemoveInvalidPathSymbols()}.json" ));
-
-    public void Save()
-    {
-        try
-        {
-            var dir = CollectionDir();
-            dir.Create();
-            var file = FileName( dir, Name );
-            SaveToFile( file );
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Could not save collection {Name}:\n{e}" );
-        }
-    }
-
-    public static ModCollection? Load( string name )
-    {
-        var file = FileName( CollectionDir(), name );
-        return file.Exists ? LoadFromFile( file ) : null;
-    }
-
-    public void Delete()
-    {
-        var file = FileName( CollectionDir(), Name );
-        if( file.Exists )
-        {
-            try
-            {
-                file.Delete();
-            }
-            catch( Exception e )
-            {
-                PluginLog.Error( $"Could not delete collection file {file} for {Name}:\n{e}" );
-            }
-        }
-    }
-
-    public void AddMod( ModData data )
-    {
-        if( Cache == null )
-        {
-            return;
-        }
-
-        Cache.AddMod( Settings.TryGetValue( data.BasePath.Name, out var settings )
-                ? settings
-                : ModSettings.DefaultSettings( data.Meta ),
-            data );
-    }
-
-    public FullPath? ResolveSwappedOrReplacementPath( Utf8GamePath gameResourcePath )
-        => Cache?.ResolveSwappedOrReplacementPath( gameResourcePath );
-
-
-    [Conditional( "USE_EQP" )]
-    public void SetEqpFiles()
-    {
-        if( Cache == null )
-        {
-            MetaManager.MetaManagerEqp.ResetFiles();
-        }
-        else
-        {
-            Cache.MetaManipulations.Eqp.SetFiles();
-        }
-    }
-
-    [Conditional( "USE_EQDP" )]
-    public void SetEqdpFiles()
-    {
-        if( Cache == null )
-        {
-            MetaManager.MetaManagerEqdp.ResetFiles();
-        }
-        else
-        {
-            Cache.MetaManipulations.Eqdp.SetFiles();
-        }
-    }
-
-    [Conditional( "USE_GMP" )]
-    public void SetGmpFiles()
-    {
-        if( Cache == null )
-        {
-            MetaManager.MetaManagerGmp.ResetFiles();
-        }
-        else
-        {
-            Cache.MetaManipulations.Gmp.SetFiles();
-        }
-    }
-
-    [Conditional( "USE_EST" )]
-    public void SetEstFiles()
-    {
-        if( Cache == null )
-        {
-            MetaManager.MetaManagerEst.ResetFiles();
-        }
-        else
-        {
-            Cache.MetaManipulations.Est.SetFiles();
-        }
-    }
-
-    [Conditional( "USE_CMP" )]
-    public void SetCmpFiles()
-    {
-        if( Cache == null )
-        {
-            MetaManager.MetaManagerCmp.ResetFiles();
-        }
-        else
-        {
-            Cache.MetaManipulations.Cmp.SetFiles();
-        }
-    }
-
-    public void SetFiles()
-    {
-        if( Cache == null )
-        {
-            Penumbra.CharacterUtility.ResetAll();
-        }
-        else
-        {
-            Cache.MetaManipulations.SetFiles();
-        }
-    }
-
-    public static readonly ModCollection Empty = new() { Name = "" };
-}
\ No newline at end of file
diff --git a/Penumbra/Mods/ModCollectionCache.cs b/Penumbra/Mods/ModCollectionCache.cs
deleted file mode 100644
index d7d56224..00000000
--- a/Penumbra/Mods/ModCollectionCache.cs
+++ /dev/null
@@ -1,662 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
-using Dalamud.Logging;
-using Penumbra.GameData.ByteString;
-using Penumbra.Meta.Manager;
-using Penumbra.Mod;
-using Penumbra.Util;
-
-namespace Penumbra.Mods;
-
-// The ModCollectionCache contains all required temporary data to use a collection.
-// It will only be setup if a collection gets activated in any way.
-public class ModCollectionCache2
-{
-    // Shared caches to avoid allocations.
-    private static readonly BitArray                        FileSeen         = new(256);
-    private static readonly Dictionary< Utf8GamePath, int > RegisteredFiles  = new(256);
-    private static readonly List< ModSettings? >            ResolvedSettings = new(128);
-
-    private readonly ModCollection2                       _collection;
-    private readonly SortedList< string, object? >        _changedItems = new();
-    public readonly  Dictionary< Utf8GamePath, FullPath > ResolvedFiles = new();
-    public readonly  HashSet< FullPath >                  MissingFiles  = new();
-    public readonly  MetaManager                          MetaManipulations;
-    private          ModCache2                            _cache;
-
-    public IReadOnlyDictionary< string, object? > ChangedItems
-    {
-        get
-        {
-            SetChangedItems();
-            return _changedItems;
-        }
-    }
-
-    public ModCollectionCache2( ModCollection2 collection )
-        => _collection = collection;
-
-    //MetaManipulations = new MetaManager( collection );
-    private static void ResetFileSeen( int size )
-    {
-        if( size < FileSeen.Length )
-        {
-            FileSeen.Length = size;
-            FileSeen.SetAll( false );
-        }
-        else
-        {
-            FileSeen.SetAll( false );
-            FileSeen.Length = size;
-        }
-    }
-
-    private void ClearStorageAndPrepare()
-    {
-        ResolvedFiles.Clear();
-        MissingFiles.Clear();
-        RegisteredFiles.Clear();
-        _changedItems.Clear();
-        _cache.ClearFileConflicts();
-
-        ResolvedSettings.Clear();
-        ResolvedSettings.AddRange( _collection.ActualSettings );
-    }
-
-    public void CalculateEffectiveFileList()
-    {
-        ClearStorageAndPrepare();
-
-        for( var i = 0; i < Penumbra.ModManager.Mods.Count; ++i )
-        {
-            if( ResolvedSettings[ i ]?.Enabled == true )
-            {
-                AddFiles( i );
-                AddSwaps( i );
-            }
-        }
-
-        AddMetaFiles();
-    }
-
-    private void SetChangedItems()
-    {
-        if( _changedItems.Count > 0 || ResolvedFiles.Count + MetaManipulations.Count == 0 )
-        {
-            return;
-        }
-
-        try
-        {
-            // Skip IMCs because they would result in far too many false-positive items,
-            // since they are per set instead of per item-slot/item/variant.
-            var identifier = GameData.GameData.GetIdentifier();
-            foreach( var resolved in ResolvedFiles.Keys.Where( file => !file.Path.EndsWith( 'i', 'm', 'c' ) ) )
-            {
-                identifier.Identify( _changedItems, resolved.ToGamePath() );
-            }
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Unknown Error:\n{e}" );
-        }
-    }
-
-
-    private void AddFiles( int idx )
-    {
-        var mod = Penumbra.ModManager.Mods[ idx ];
-        ResetFileSeen( mod.Resources.ModFiles.Count );
-        // Iterate in reverse so that later groups take precedence before earlier ones.
-        foreach( var group in mod.Meta.Groups.Values.Reverse() )
-        {
-            switch( group.SelectionType )
-            {
-                case SelectType.Single:
-                    AddFilesForSingle( group, mod, idx );
-                    break;
-                case SelectType.Multi:
-                    AddFilesForMulti( group, mod, idx );
-                    break;
-                default: throw new InvalidEnumArgumentException();
-            }
-        }
-
-        AddRemainingFiles( mod, idx );
-    }
-
-    private static bool FilterFile( Utf8GamePath gamePath )
-    {
-        // If audio streaming is not disabled, replacing .scd files crashes the game,
-        // so only add those files if it is disabled.
-        if( !Penumbra.Config.DisableSoundStreaming
-        && gamePath.Path.EndsWith( '.', 's', 'c', 'd' ) )
-        {
-            return true;
-        }
-
-        return false;
-    }
-
-
-    private void AddFile( int modIdx, Utf8GamePath gamePath, FullPath file )
-    {
-        if( FilterFile( gamePath ) )
-        {
-            return;
-        }
-
-        if( !RegisteredFiles.TryGetValue( gamePath, out var oldModIdx ) )
-        {
-            RegisteredFiles.Add( gamePath, modIdx );
-            ResolvedFiles[ gamePath ] = file;
-        }
-        else
-        {
-            var priority    = ResolvedSettings[ modIdx ]!.Priority;
-            var oldPriority = ResolvedSettings[ oldModIdx ]!.Priority;
-            _cache.AddConflict( oldModIdx, modIdx, oldPriority, priority, gamePath );
-            if( priority > oldPriority )
-            {
-                ResolvedFiles[ gamePath ]   = file;
-                RegisteredFiles[ gamePath ] = modIdx;
-            }
-        }
-    }
-
-    private void AddMissingFile( FullPath file )
-    {
-        switch( file.Extension.ToLowerInvariant() )
-        {
-            case ".meta":
-            case ".rgsp":
-                return;
-            default:
-                MissingFiles.Add( file );
-                return;
-        }
-    }
-
-    private void AddPathsForOption( Option option, ModData mod, int modIdx, bool enabled )
-    {
-        foreach( var (file, paths) in option.OptionFiles )
-        {
-            var fullPath = new FullPath( mod.BasePath, file );
-            var idx      = mod.Resources.ModFiles.IndexOf( f => f.Equals( fullPath ) );
-            if( idx < 0 )
-            {
-                AddMissingFile( fullPath );
-                continue;
-            }
-
-            var registeredFile = mod.Resources.ModFiles[ idx ];
-            if( !registeredFile.Exists )
-            {
-                AddMissingFile( registeredFile );
-                continue;
-            }
-
-            FileSeen.Set( idx, true );
-            if( enabled )
-            {
-                foreach( var path in paths )
-                {
-                    AddFile( modIdx, path, registeredFile );
-                }
-            }
-        }
-    }
-
-    private void AddFilesForSingle( OptionGroup singleGroup, ModData mod, int modIdx )
-    {
-        Debug.Assert( singleGroup.SelectionType == SelectType.Single );
-        var settings = ResolvedSettings[ modIdx ]!;
-        if( !settings.Settings.TryGetValue( singleGroup.GroupName, out var setting ) )
-        {
-            setting = 0;
-        }
-
-        for( var i = 0; i < singleGroup.Options.Count; ++i )
-        {
-            AddPathsForOption( singleGroup.Options[ i ], mod, modIdx, setting == i );
-        }
-    }
-
-    private void AddFilesForMulti( OptionGroup multiGroup, ModData mod, int modIdx )
-    {
-        Debug.Assert( multiGroup.SelectionType == SelectType.Multi );
-        var settings = ResolvedSettings[ modIdx ]!;
-        if( !settings.Settings.TryGetValue( multiGroup.GroupName, out var setting ) )
-        {
-            return;
-        }
-
-        // Also iterate options in reverse so that later options take precedence before earlier ones.
-        for( var i = multiGroup.Options.Count - 1; i >= 0; --i )
-        {
-            AddPathsForOption( multiGroup.Options[ i ], mod, modIdx, ( setting & ( 1 << i ) ) != 0 );
-        }
-    }
-
-    private void AddRemainingFiles( ModData mod, int modIdx )
-    {
-        for( var i = 0; i < mod.Resources.ModFiles.Count; ++i )
-        {
-            if( FileSeen.Get( i ) )
-            {
-                continue;
-            }
-
-            var file = mod.Resources.ModFiles[ i ];
-            if( file.Exists )
-            {
-                if( file.ToGamePath( mod.BasePath, out var gamePath ) )
-                {
-                    AddFile( modIdx, gamePath, file );
-                }
-                else
-                {
-                    PluginLog.Warning( $"Could not convert {file} in {mod.BasePath.FullName} to GamePath." );
-                }
-            }
-            else
-            {
-                MissingFiles.Add( file );
-            }
-        }
-    }
-
-    private void AddMetaFiles()
-        => MetaManipulations.Imc.SetFiles();
-
-    private void AddSwaps( int modIdx )
-    {
-        var mod = Penumbra.ModManager.Mods[ modIdx ];
-        foreach( var (gamePath, swapPath) in mod.Meta.FileSwaps.Where( kvp => !FilterFile( kvp.Key ) ) )
-        {
-            AddFile( modIdx, gamePath, swapPath );
-        }
-    }
-
-    // TODO Manipulations
-    public FullPath? GetCandidateForGameFile( Utf8GamePath gameResourcePath )
-    {
-        if( !ResolvedFiles.TryGetValue( gameResourcePath, out var candidate ) )
-        {
-            return null;
-        }
-
-        if( candidate.InternalName.Length > Utf8GamePath.MaxGamePathLength
-        || candidate.IsRooted && !candidate.Exists )
-        {
-            return null;
-        }
-
-        return candidate;
-    }
-
-    public FullPath? ResolveSwappedOrReplacementPath( Utf8GamePath gameResourcePath )
-        => GetCandidateForGameFile( gameResourcePath );
-}
-
-// The ModCollectionCache contains all required temporary data to use a collection.
-// It will only be setup if a collection gets activated in any way.
-public class ModCollectionCache
-{
-    // Shared caches to avoid allocations.
-    private static readonly BitArray                            FileSeen        = new(256);
-    private static readonly Dictionary< Utf8GamePath, Mod.Mod > RegisteredFiles = new(256);
-
-    public readonly Dictionary< string, Mod.Mod > AvailableMods = new();
-
-    private readonly SortedList< string, object? >        _changedItems = new();
-    public readonly  Dictionary< Utf8GamePath, FullPath > ResolvedFiles = new();
-    public readonly  HashSet< FullPath >                  MissingFiles  = new();
-    public readonly  MetaManager                          MetaManipulations;
-
-    public IReadOnlyDictionary< string, object? > ChangedItems
-    {
-        get
-        {
-            SetChangedItems();
-            return _changedItems;
-        }
-    }
-
-    public ModCollectionCache( ModCollection collection )
-        => MetaManipulations = new MetaManager( collection );
-
-    private static void ResetFileSeen( int size )
-    {
-        if( size < FileSeen.Length )
-        {
-            FileSeen.Length = size;
-            FileSeen.SetAll( false );
-        }
-        else
-        {
-            FileSeen.SetAll( false );
-            FileSeen.Length = size;
-        }
-    }
-
-    public void CalculateEffectiveFileList()
-    {
-        ResolvedFiles.Clear();
-        MissingFiles.Clear();
-        RegisteredFiles.Clear();
-        _changedItems.Clear();
-
-        foreach( var mod in AvailableMods.Values
-                   .Where( m => m.Settings.Enabled )
-                   .OrderByDescending( m => m.Settings.Priority ) )
-        {
-            mod.Cache.ClearFileConflicts();
-            AddFiles( mod );
-            AddSwaps( mod );
-        }
-
-        AddMetaFiles();
-    }
-
-    private void SetChangedItems()
-    {
-        if( _changedItems.Count > 0 || ResolvedFiles.Count + MetaManipulations.Count == 0 )
-        {
-            return;
-        }
-
-        try
-        {
-            // Skip IMCs because they would result in far too many false-positive items,
-            // since they are per set instead of per item-slot/item/variant.
-            var identifier = GameData.GameData.GetIdentifier();
-            foreach( var resolved in ResolvedFiles.Keys.Where( file => !file.Path.EndsWith( 'i', 'm', 'c' ) ) )
-            {
-                identifier.Identify( _changedItems, resolved.ToGamePath() );
-            }
-        }
-        catch( Exception e )
-        {
-            PluginLog.Error( $"Unknown Error:\n{e}" );
-        }
-    }
-
-
-    private void AddFiles( Mod.Mod mod )
-    {
-        ResetFileSeen( mod.Data.Resources.ModFiles.Count );
-        // Iterate in reverse so that later groups take precedence before earlier ones.
-        foreach( var group in mod.Data.Meta.Groups.Values.Reverse() )
-        {
-            switch( group.SelectionType )
-            {
-                case SelectType.Single:
-                    AddFilesForSingle( group, mod );
-                    break;
-                case SelectType.Multi:
-                    AddFilesForMulti( group, mod );
-                    break;
-                default: throw new InvalidEnumArgumentException();
-            }
-        }
-
-        AddRemainingFiles( mod );
-    }
-
-    private static bool FilterFile( Utf8GamePath gamePath )
-    {
-        // If audio streaming is not disabled, replacing .scd files crashes the game,
-        // so only add those files if it is disabled.
-        if( !Penumbra.Config.DisableSoundStreaming
-        && gamePath.Path.EndsWith( '.', 's', 'c', 'd' ) )
-        {
-            return true;
-        }
-
-        return false;
-    }
-
-
-    private void AddFile( Mod.Mod mod, Utf8GamePath gamePath, FullPath file )
-    {
-        if( FilterFile( gamePath ) )
-        {
-            return;
-        }
-
-        if( !RegisteredFiles.TryGetValue( gamePath, out var oldMod ) )
-        {
-            RegisteredFiles.Add( gamePath, mod );
-            ResolvedFiles[ gamePath ] = file;
-        }
-        else
-        {
-            mod.Cache.AddConflict( oldMod, gamePath );
-            if( !ReferenceEquals( mod, oldMod ) && mod.Settings.Priority == oldMod.Settings.Priority )
-            {
-                oldMod.Cache.AddConflict( mod, gamePath );
-            }
-        }
-    }
-
-    private void AddMissingFile( FullPath file )
-    {
-        switch( file.Extension.ToLowerInvariant() )
-        {
-            case ".meta":
-            case ".rgsp":
-                return;
-            default:
-                MissingFiles.Add( file );
-                return;
-        }
-    }
-
-    private void AddPathsForOption( Option option, Mod.Mod mod, bool enabled )
-    {
-        foreach( var (file, paths) in option.OptionFiles )
-        {
-            var fullPath = new FullPath( mod.Data.BasePath, file );
-            var idx      = mod.Data.Resources.ModFiles.IndexOf( f => f.Equals( fullPath ) );
-            if( idx < 0 )
-            {
-                AddMissingFile( fullPath );
-                continue;
-            }
-
-            var registeredFile = mod.Data.Resources.ModFiles[ idx ];
-            if( !registeredFile.Exists )
-            {
-                AddMissingFile( registeredFile );
-                continue;
-            }
-
-            FileSeen.Set( idx, true );
-            if( enabled )
-            {
-                foreach( var path in paths )
-                {
-                    AddFile( mod, path, registeredFile );
-                }
-            }
-        }
-    }
-
-    private void AddFilesForSingle( OptionGroup singleGroup, Mod.Mod mod )
-    {
-        Debug.Assert( singleGroup.SelectionType == SelectType.Single );
-
-        if( !mod.Settings.Settings.TryGetValue( singleGroup.GroupName, out var setting ) )
-        {
-            setting = 0;
-        }
-
-        for( var i = 0; i < singleGroup.Options.Count; ++i )
-        {
-            AddPathsForOption( singleGroup.Options[ i ], mod, setting == i );
-        }
-    }
-
-    private void AddFilesForMulti( OptionGroup multiGroup, Mod.Mod mod )
-    {
-        Debug.Assert( multiGroup.SelectionType == SelectType.Multi );
-
-        if( !mod.Settings.Settings.TryGetValue( multiGroup.GroupName, out var setting ) )
-        {
-            return;
-        }
-
-        // Also iterate options in reverse so that later options take precedence before earlier ones.
-        for( var i = multiGroup.Options.Count - 1; i >= 0; --i )
-        {
-            AddPathsForOption( multiGroup.Options[ i ], mod, ( setting & ( 1 << i ) ) != 0 );
-        }
-    }
-
-    private void AddRemainingFiles( Mod.Mod mod )
-    {
-        for( var i = 0; i < mod.Data.Resources.ModFiles.Count; ++i )
-        {
-            if( FileSeen.Get( i ) )
-            {
-                continue;
-            }
-
-            var file = mod.Data.Resources.ModFiles[ i ];
-            if( file.Exists )
-            {
-                if( file.ToGamePath( mod.Data.BasePath, out var gamePath ) )
-                {
-                    AddFile( mod, gamePath, file );
-                }
-                else
-                {
-                    PluginLog.Warning( $"Could not convert {file} in {mod.Data.BasePath.FullName} to GamePath." );
-                }
-            }
-            else
-            {
-                MissingFiles.Add( file );
-            }
-        }
-    }
-
-    private void AddMetaFiles()
-        => MetaManipulations.Imc.SetFiles();
-
-    private void AddSwaps( Mod.Mod mod )
-    {
-        foreach( var (key, value) in mod.Data.Meta.FileSwaps.Where( kvp => !FilterFile( kvp.Key ) ) )
-        {
-            if( !RegisteredFiles.TryGetValue( key, out var oldMod ) )
-            {
-                RegisteredFiles.Add( key, mod );
-                ResolvedFiles.Add( key, value );
-            }
-            else
-            {
-                mod.Cache.AddConflict( oldMod, key );
-                if( !ReferenceEquals( mod, oldMod ) && mod.Settings.Priority == oldMod.Settings.Priority )
-                {
-                    oldMod.Cache.AddConflict( mod, key );
-                }
-            }
-        }
-    }
-
-    private void AddManipulations( Mod.Mod mod )
-    {
-        foreach( var manip in mod.Data.Resources.MetaManipulations.GetManipulationsForConfig( mod.Settings, mod.Data.Meta ) )
-        {
-            if( !MetaManipulations.TryGetValue( manip, out var oldMod ) )
-            {
-                MetaManipulations.ApplyMod( manip, mod );
-            }
-            else
-            {
-                mod.Cache.AddConflict( oldMod!, manip );
-                if( !ReferenceEquals( mod, oldMod ) && mod.Settings.Priority == oldMod!.Settings.Priority )
-                {
-                    oldMod.Cache.AddConflict( mod, manip );
-                }
-            }
-        }
-    }
-
-    public void UpdateMetaManipulations()
-    {
-        MetaManipulations.Reset();
-
-        foreach( var mod in AvailableMods.Values.Where( m => m.Settings.Enabled && m.Data.Resources.MetaManipulations.Count > 0 ) )
-        {
-            mod.Cache.ClearMetaConflicts();
-            AddManipulations( mod );
-        }
-    }
-
-    public void RemoveMod( DirectoryInfo basePath )
-    {
-        if( !AvailableMods.TryGetValue( basePath.Name, out var mod ) )
-        {
-            return;
-        }
-
-        AvailableMods.Remove( basePath.Name );
-        if( !mod.Settings.Enabled )
-        {
-            return;
-        }
-
-        CalculateEffectiveFileList();
-        if( mod.Data.Resources.MetaManipulations.Count > 0 )
-        {
-            UpdateMetaManipulations();
-        }
-    }
-
-    public void AddMod( ModSettings settings, ModData data, bool updateFileList = true )
-    {
-        if( AvailableMods.ContainsKey( data.BasePath.Name ) )
-        {
-            return;
-        }
-
-        AvailableMods[ data.BasePath.Name ] = new Mod.Mod( settings, data );
-
-        if( !updateFileList || !settings.Enabled )
-        {
-            return;
-        }
-
-        CalculateEffectiveFileList();
-        if( data.Resources.MetaManipulations.Count > 0 )
-        {
-            UpdateMetaManipulations();
-        }
-    }
-
-    public FullPath? GetCandidateForGameFile( Utf8GamePath gameResourcePath )
-    {
-        if( !ResolvedFiles.TryGetValue( gameResourcePath, out var candidate ) )
-        {
-            return null;
-        }
-
-        if( candidate.InternalName.Length > Utf8GamePath.MaxGamePathLength
-        || candidate.IsRooted && !candidate.Exists )
-        {
-            return null;
-        }
-
-        return candidate;
-    }
-
-    public FullPath? ResolveSwappedOrReplacementPath( Utf8GamePath gameResourcePath )
-        => GetCandidateForGameFile( gameResourcePath );
-}
\ No newline at end of file
diff --git a/Penumbra/Mods/ModManager.cs b/Penumbra/Mods/ModManager.cs
index a23a9a32..b88a9bca 100644
--- a/Penumbra/Mods/ModManager.cs
+++ b/Penumbra/Mods/ModManager.cs
@@ -263,7 +263,7 @@ public class ModManager : IEnumerable< ModData >
             mod.Resources.MetaManipulations.SaveToFile( MetaCollection.FileName( mod.BasePath ) );
         }
 
-        Penumbra.CollectionManager.UpdateCollections( mod, metaChanges, fileChanges, nameChange, reloadMeta ); // TODO
+        // TODO: more specific mod changes?
         ModChange?.Invoke( ModChangeType.Changed, idx, mod );
         return true;
     }
@@ -271,10 +271,6 @@ public class ModManager : IEnumerable< ModData >
     public bool UpdateMod( ModData mod, bool reloadMeta = false, bool recomputeMeta = false, bool force = false )
         => UpdateMod( Mods.IndexOf( mod ), reloadMeta, recomputeMeta, force );
 
-    public FullPath? ResolveSwappedOrReplacementPath( Utf8GamePath gameResourcePath )
-    {
-        var ret = Penumbra.CollectionManager.DefaultCollection.ResolveSwappedOrReplacementPath( gameResourcePath );
-        ret ??= Penumbra.CollectionManager.ForcedCollection.ResolveSwappedOrReplacementPath( gameResourcePath );
-        return ret;
-    }
+    public static FullPath? ResolvePath( Utf8GamePath gameResourcePath )
+        => Penumbra.CollectionManager.Default.ResolvePath( gameResourcePath );
 }
\ No newline at end of file
diff --git a/Penumbra/Mods/ModManagerEditExtensions.cs b/Penumbra/Mods/ModManagerEditExtensions.cs
index 93c96c86..5083075a 100644
--- a/Penumbra/Mods/ModManagerEditExtensions.cs
+++ b/Penumbra/Mods/ModManagerEditExtensions.cs
@@ -4,6 +4,7 @@ using System.ComponentModel;
 using System.IO;
 using Dalamud.Logging;
 using Penumbra.Mod;
+using Penumbra.Util;
 
 namespace Penumbra.Mods;
 
@@ -82,20 +83,13 @@ public static class ModManagerEditExtensions
             manager.Config.Save();
         }
 
-        foreach( var collection in Penumbra.CollectionManager.Collections )
+        var idx = manager.Mods.IndexOf( mod );
+        foreach( var collection in Penumbra.CollectionManager )
         {
-            if( collection.Settings.TryGetValue( oldBasePath.Name, out var settings ) )
+            if( collection.Settings[ idx ] != null )
             {
-                collection.Settings[ newDir.Name ] = settings;
-                collection.Settings.Remove( oldBasePath.Name );
                 collection.Save();
             }
-
-            if( collection.Cache != null )
-            {
-                collection.Cache.RemoveMod( newDir );
-                collection.AddMod( mod );
-            }
         }
 
         return true;
@@ -140,9 +134,13 @@ public static class ModManagerEditExtensions
 
         mod.SaveMeta();
 
-        foreach( var collection in Penumbra.CollectionManager.Collections )
+        // TODO to indices
+        var idx = Penumbra.ModManager.Mods.IndexOf( mod );
+
+        foreach( var collection in Penumbra.CollectionManager )
         {
-            if( !collection.Settings.TryGetValue( mod.BasePath.Name, out var settings ) )
+            var settings = collection.Settings[ idx ];
+            if( settings == null )
             {
                 continue;
             }
@@ -176,9 +174,11 @@ public static class ModManagerEditExtensions
             return ( oldSetting & bitmaskFront ) | ( ( oldSetting & bitmaskBack ) >> 1 );
         }
 
-        foreach( var collection in Penumbra.CollectionManager.Collections )
+        var idx = Penumbra.ModManager.Mods.IndexOf( mod ); // TODO
+        foreach( var collection in Penumbra.CollectionManager )
         {
-            if( !collection.Settings.TryGetValue( mod.BasePath.Name, out var settings ) )
+            var settings = collection.Settings[ idx ];
+            if( settings == null )
             {
                 continue;
             }
@@ -199,10 +199,10 @@ public static class ModManagerEditExtensions
             {
                 settings.Settings[ group.GroupName ] = newSetting;
                 collection.Save();
-                if( collection.Cache != null && settings.Enabled )
+                if( collection.HasCache && settings.Enabled )
                 {
                     collection.CalculateEffectiveFileList( mod.Resources.MetaManipulations.Count > 0,
-                        Penumbra.CollectionManager.IsActive( collection ) );
+                        Penumbra.CollectionManager.Default == collection );
                 }
             }
         }
diff --git a/Penumbra/Penumbra.cs b/Penumbra/Penumbra.cs
index e2116f65..70535479 100644
--- a/Penumbra/Penumbra.cs
+++ b/Penumbra/Penumbra.cs
@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using Dalamud.Game.Command;
 using Dalamud.Logging;
 using Dalamud.Plugin;
@@ -12,7 +13,7 @@ using Penumbra.Interop;
 using Penumbra.Mods;
 using Penumbra.UI;
 using Penumbra.Util;
-using System.Linq;
+using Penumbra.Collections;
 using Penumbra.Interop.Loader;
 using Penumbra.Interop.Resolver;
 
@@ -34,7 +35,7 @@ public class Penumbra : IDalamudPlugin
     public static CharacterUtility CharacterUtility { get; private set; } = null!;
 
     public static ModManager ModManager { get; private set; } = null!;
-    public static CollectionManager CollectionManager { get; private set; } = null!;
+    public static CollectionManager2 CollectionManager { get; private set; } = null!;
 
     public static ResourceLoader ResourceLoader { get; set; } = null!;
     public ResourceLogger ResourceLogger { get; }
@@ -67,7 +68,7 @@ public class Penumbra : IDalamudPlugin
         ResourceLogger    = new ResourceLogger( ResourceLoader );
         ModManager        = new ModManager();
         ModManager.DiscoverMods();
-        CollectionManager = new CollectionManager( ModManager );
+        CollectionManager = new CollectionManager2( ModManager );
         ObjectReloader    = new ObjectReloader();
         PathResolver      = new PathResolver( ResourceLoader );
 
@@ -110,10 +111,15 @@ public class Penumbra : IDalamudPlugin
             ResourceLoader.EnableFullLogging();
         }
 
-        if (CollectionManager.CharacterCollection.Count > 0)
+        if( CollectionManager.HasCharacterCollections )
+        {
             PathResolver.Enable();
+        }
 
         ResidentResources.Reload();
+        //var c = ModCollection2.LoadFromFile( new FileInfo(@"C:\Users\Ozy\AppData\Roaming\XIVLauncher\pluginConfigs\Penumbra\collections\Rayla.json"),
+        //    out var inheritance );
+        //c?.Save();
     }
 
     public bool Enable()
@@ -217,10 +223,9 @@ public class Penumbra : IDalamudPlugin
         type           = type.ToLowerInvariant();
         collectionName = collectionName.ToLowerInvariant();
 
-        var collection = string.Equals( collectionName, ModCollection.Empty.Name, StringComparison.InvariantCultureIgnoreCase )
-            ? ModCollection.Empty
-            : CollectionManager.Collections.FirstOrDefault( c
-                => string.Equals( c.Name, collectionName, StringComparison.InvariantCultureIgnoreCase ) );
+        var collection = string.Equals( collectionName, ModCollection2.Empty.Name, StringComparison.InvariantCultureIgnoreCase )
+            ? ModCollection2.Empty
+            : CollectionManager[collectionName];
         if( collection == null )
         {
             Dalamud.Chat.Print( $"The collection {collection} does not exist." );
@@ -230,7 +235,7 @@ public class Penumbra : IDalamudPlugin
         switch( type )
         {
             case "default":
-                if( collection == CollectionManager.DefaultCollection )
+                if( collection == CollectionManager.Default )
                 {
                     Dalamud.Chat.Print( $"{collection.Name} already is the default collection." );
                     return false;
@@ -240,20 +245,9 @@ public class Penumbra : IDalamudPlugin
                 Dalamud.Chat.Print( $"Set {collection.Name} as default collection." );
                 SettingsInterface.ResetDefaultCollection();
                 return true;
-            case "forced":
-                if( collection == CollectionManager.ForcedCollection )
-                {
-                    Dalamud.Chat.Print( $"{collection.Name} already is the forced collection." );
-                    return false;
-                }
-
-                CollectionManager.SetCollection( collection, CollectionType.Forced );
-                Dalamud.Chat.Print( $"Set {collection.Name} as forced collection." );
-                SettingsInterface.ResetForcedCollection();
-                return true;
             default:
                 Dalamud.Chat.Print(
-                    "Second command argument is not default or forced, the correct command format is: /penumbra collection {default|forced} <collectionName>" );
+                    "Second command argument is not default, the correct command format is: /penumbra collection default <collectionName>" );
                 return false;
         }
     }
diff --git a/Penumbra/UI/MenuTabs/TabCollections.cs b/Penumbra/UI/MenuTabs/TabCollections.cs
index 4bcb4224..2d94eaef 100644
--- a/Penumbra/UI/MenuTabs/TabCollections.cs
+++ b/Penumbra/UI/MenuTabs/TabCollections.cs
@@ -6,6 +6,7 @@ using Dalamud.Interface;
 using Dalamud.Interface.Components;
 using Dalamud.Logging;
 using ImGuiNET;
+using Penumbra.Collections;
 using Penumbra.Mod;
 using Penumbra.Mods;
 using Penumbra.UI.Custom;
@@ -21,7 +22,7 @@ public partial class SettingsInterface
         private readonly Selector                  _selector;
         private          string                    _collectionNames         = null!;
         private          string                    _collectionNamesWithNone = null!;
-        private          ModCollection[]           _collections             = null!;
+        private          ModCollection2[]          _collections             = null!;
         private          int                       _currentCollectionIndex;
         private          int                       _currentForcedIndex;
         private          int                       _currentDefaultIndex;
@@ -31,14 +32,14 @@ public partial class SettingsInterface
 
         private void UpdateNames()
         {
-            _collections             = Penumbra.CollectionManager.Collections.Prepend( ModCollection.Empty ).ToArray();
+            _collections             = Penumbra.CollectionManager.Prepend( ModCollection2.Empty ).ToArray();
             _collectionNames         = string.Join( "\0", _collections.Skip( 1 ).Select( c => c.Name ) ) + '\0';
             _collectionNamesWithNone = "None\0"                                                          + _collectionNames;
             UpdateIndices();
         }
 
 
-        private int GetIndex( ModCollection collection )
+        private int GetIndex( ModCollection2 collection )
         {
             var ret = _collections.IndexOf( c => c.Name == collection.Name );
             if( ret < 0 )
@@ -175,7 +176,7 @@ public partial class SettingsInterface
             }
         }
 
-        public void SetCurrentCollection( ModCollection collection, bool force = false )
+        public void SetCurrentCollection( ModCollection2 collection, bool force = false )
         {
             var idx = Array.IndexOf( _collections, collection ) - 1;
             if( idx >= 0 )
diff --git a/Penumbra/UI/MenuTabs/TabEffective.cs b/Penumbra/UI/MenuTabs/TabEffective.cs
index 672e5a8c..cbf17b9b 100644
--- a/Penumbra/UI/MenuTabs/TabEffective.cs
+++ b/Penumbra/UI/MenuTabs/TabEffective.cs
@@ -3,6 +3,7 @@ using System.IO;
 using System.Linq;
 using Dalamud.Interface;
 using ImGuiNET;
+using Penumbra.Collections;
 using Penumbra.GameData.ByteString;
 using Penumbra.GameData.Util;
 using Penumbra.Mods;
@@ -99,9 +100,9 @@ public partial class SettingsInterface
             return !_filePathFilter.Any() || kvp.Item3.Contains( _filePathFilterLower );
         }
 
-        private void DrawFilteredRows( ModCollectionCache? active, ModCollectionCache? forced )
+        private void DrawFilteredRows( ModCollection2 active )
         {
-            void DrawFileLines( ModCollectionCache cache )
+            void DrawFileLines( ModCollection2.Cache cache )
             {
                 foreach( var (gp, fp) in cache.ResolvedFiles.Where( CheckFilters ) )
                 {
@@ -116,15 +117,7 @@ public partial class SettingsInterface
                 //}
             }
 
-            if( active != null )
-            {
-                DrawFileLines( active );
-            }
-
-            if( forced != null )
-            {
-                DrawFileLines( forced );
-            }
+            DrawFileLines( active );
         }
 
         public void Draw()
diff --git a/Penumbra/UI/MenuTabs/TabInstalled/ModListCache.cs b/Penumbra/UI/MenuTabs/TabInstalled/ModListCache.cs
index a87a8b22..fd0a0951 100644
--- a/Penumbra/UI/MenuTabs/TabInstalled/ModListCache.cs
+++ b/Penumbra/UI/MenuTabs/TabInstalled/ModListCache.cs
@@ -151,7 +151,7 @@ namespace Penumbra.UI
             {
                 foreach( var modData in _manager.StructuredMods.AllMods( _manager.Config.SortFoldersFirst ) )
                 {
-                    var mod = Penumbra.CollectionManager.CurrentCollection.GetMod( modData );
+                    var mod = Penumbra.CollectionManager.Current.GetMod( modData );
                     _modsInOrder.Add( mod );
                     _visibleMods.Add( CheckFilters( mod ) );
                 }
diff --git a/Penumbra/UI/MenuTabs/TabInstalled/TabInstalledSelector.cs b/Penumbra/UI/MenuTabs/TabInstalled/TabInstalledSelector.cs
index 3374a522..1ae71c8b 100644
--- a/Penumbra/UI/MenuTabs/TabInstalled/TabInstalledSelector.cs
+++ b/Penumbra/UI/MenuTabs/TabInstalled/TabInstalledSelector.cs
@@ -8,6 +8,7 @@ using System.Windows.Forms.VisualStyles;
 using Dalamud.Interface;
 using Dalamud.Logging;
 using ImGuiNET;
+using Penumbra.Collections;
 using Penumbra.Importer;
 using Penumbra.Mod;
 using Penumbra.Mods;
@@ -606,10 +607,10 @@ public partial class SettingsInterface
             Cache = new ModListCache( Penumbra.ModManager, newMods );
         }
 
-        private void DrawCollectionButton( string label, string tooltipLabel, float size, ModCollection collection )
+        private void DrawCollectionButton( string label, string tooltipLabel, float size, ModCollection2 collection )
         {
-            if( collection == ModCollection.Empty
-            || collection  == Penumbra.CollectionManager.CurrentCollection )
+            if( collection == ModCollection2.Empty
+            || collection  == Penumbra.CollectionManager.Current )
             {
                 using var _ = ImGuiRaii.PushStyle( ImGuiStyleVar.Alpha, 0.5f );
                 ImGui.Button( label, Vector2.UnitX * size );
@@ -632,16 +633,13 @@ public partial class SettingsInterface
             var comboSize = size * ImGui.GetIO().FontGlobalScale;
             var offset    = comboSize + textSize;
 
-            var buttonSize = Math.Max( ( ImGui.GetWindowContentRegionWidth()
-                  - offset
-                  - SelectorPanelWidth * _selectorScalingFactor
-                  - 4                  * ImGui.GetStyle().ItemSpacing.X )
-              / 2, 5f );
+            var buttonSize = Math.Max( ImGui.GetWindowContentRegionWidth()
+              - offset
+              - SelectorPanelWidth * _selectorScalingFactor
+              - 3                  * ImGui.GetStyle().ItemSpacing.X, 5f );
             ImGui.SameLine();
-            DrawCollectionButton( "Default", "default", buttonSize, Penumbra.CollectionManager.DefaultCollection );
+            DrawCollectionButton( "Default", "default", buttonSize, Penumbra.CollectionManager.Default );
 
-            ImGui.SameLine();
-            DrawCollectionButton( "Forced", "forced", buttonSize, Penumbra.CollectionManager.ForcedCollection );
 
             ImGui.SameLine();
             ImGui.SetNextItemWidth( comboSize );