diff --git a/BossMod/BossModule/ArenaBounds.cs b/BossMod/BossModule/ArenaBounds.cs
index 653a39020f..d8392443ca 100644
--- a/BossMod/BossModule/ArenaBounds.cs
+++ b/BossMod/BossModule/ArenaBounds.cs
@@ -127,6 +127,7 @@ private Pathfinding.Map BuildMap()
 // if rotation is 0, half-width is along X and half-height is along Z
 public record class ArenaBoundsRect(float HalfWidth, float HalfHeight, Angle Rotation = default, float MapResolution = 0.5f) : ArenaBounds(CalculateRadius(HalfHeight, HalfWidth, Rotation), MapResolution)
 {
+    private Pathfinding.Map? _cachedMap;
     public readonly WDir Orientation = Rotation.ToDirection();
 
     private static float CalculateRadius(float HalfWidth, float HalfHeight, Angle Rotation)
@@ -147,10 +148,17 @@ private static float CalculateRadius(float HalfWidth, float HalfHeight, Angle Ro
     }
 
     protected override PolygonClipper.Operand BuildClipPoly() => new(CurveApprox.Rect(Orientation, HalfWidth, HalfHeight));
-    public override void PathfindMap(Pathfinding.Map map, WPos center) => map.Init(MapResolution, center, HalfWidth, HalfHeight, Rotation);
+    public override void PathfindMap(Pathfinding.Map map, WPos center) => map.Init(_cachedMap ??= BuildMap(), center);
     public override bool Contains(WDir offset) => offset.InRect(Orientation, HalfHeight, HalfHeight, HalfWidth);
     public override float IntersectRay(WDir originOffset, WDir dir) => Intersect.RayRect(originOffset, dir, Orientation, HalfWidth, HalfHeight);
 
+    private Pathfinding.Map BuildMap()
+    {
+        var map = new Pathfinding.Map(MapResolution, default, HalfWidth, HalfHeight, Rotation);
+        map.BlockPixelsInside(ShapeDistance.InvertedRect(default, Rotation, HalfHeight, HalfHeight, HalfWidth), 0, 0);
+        return map;
+    }
+
     public override WDir ClampToBounds(WDir offset)
     {
         var dx = MathF.Abs(offset.Dot(Orientation.OrthoL()));
diff --git a/BossMod/Modules/Endwalker/Dungeon/D13LunarSubterrane/D132DamcyanAntlion.cs b/BossMod/Modules/Endwalker/Dungeon/D13LunarSubterrane/D132DamcyanAntlion.cs
index 7f4902089e..562fde2c32 100644
--- a/BossMod/Modules/Endwalker/Dungeon/D13LunarSubterrane/D132DamcyanAntlion.cs
+++ b/BossMod/Modules/Endwalker/Dungeon/D13LunarSubterrane/D132DamcyanAntlion.cs
@@ -29,7 +29,7 @@ class Sandblast(BossModule module) : Components.RaidwideCast(module, ActionID.Ma
 
 class SandblastVoidzone(BossModule module) : Components.GenericAOEs(module)
 {
-    private static readonly AOEShapeRect rect = new(19.5f, 5, 19.5f);
+    private static readonly AOEShapeRect rect = new(19.5f, 2.5f, 19.5f);
     private readonly List<AOEInstance> _aoes = [];
 
     public override IEnumerable<AOEInstance> ActiveAOEs(int slot, Actor actor) => _aoes;