diff --git a/Simulator/ActionProc.cs b/Simulator/ActionProc.cs
new file mode 100644
index 0000000..9fcc893
--- /dev/null
+++ b/Simulator/ActionProc.cs
@@ -0,0 +1,8 @@
+namespace Craftimizer.Simulator;
+
+public enum ActionProc : byte
+{
+    None,
+    UsedBasicTouch,
+    AdvancedTouch
+}
diff --git a/Simulator/ActionStates.cs b/Simulator/ActionStates.cs
index c59f448..5d4cbe8 100644
--- a/Simulator/ActionStates.cs
+++ b/Simulator/ActionStates.cs
@@ -7,22 +7,21 @@ namespace Craftimizer.Simulator;
 [StructLayout(LayoutKind.Auto)]
 public record struct ActionStates
 {
-    public byte TouchComboIdx;
+    public ActionProc Combo;
     public byte CarefulObservationCount;
     public bool UsedHeartAndSoul;
     public bool UsedQuickInnovation;
     public bool UsedTrainedPerfection;
-    public bool ObserveCombo;
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public void MutateState(BaseAction baseAction)
     {
         if (baseAction is BasicTouch)
-            TouchComboIdx = 1;
-        else if (TouchComboIdx == 1 && baseAction is StandardTouch)
-            TouchComboIdx = 2;
+            Combo = ActionProc.UsedBasicTouch;
+        else if ((Combo == ActionProc.UsedBasicTouch && baseAction is StandardTouch) || baseAction is Observe)
+            Combo = ActionProc.AdvancedTouch;
         else
-            TouchComboIdx = 0;
+            Combo = ActionProc.None;
 
         if (baseAction is CarefulObservation)
             CarefulObservationCount++;
@@ -35,7 +34,5 @@ public void MutateState(BaseAction baseAction)
 
         if (baseAction is TrainedPerfection)
             UsedTrainedPerfection = true;
-
-        ObserveCombo = baseAction is Observe;
     }
 }
diff --git a/Simulator/Actions/AdvancedTouch.cs b/Simulator/Actions/AdvancedTouch.cs
index 273ca5f..41a54b9 100644
--- a/Simulator/Actions/AdvancedTouch.cs
+++ b/Simulator/Actions/AdvancedTouch.cs
@@ -6,5 +6,5 @@ internal sealed class AdvancedTouch() : BaseAction(
     defaultCPCost: 46, defaultEfficiency: 150)
 {
     public override int CPCost(Simulator s) =>
-        (s.ActionStates.TouchComboIdx == 2 || s.ActionStates.ObserveCombo) ? 18 : 46;
+        (s.ActionStates.Combo == ActionProc.AdvancedTouch) ? 18 : 46;
 }
diff --git a/Simulator/Actions/RefinedTouch.cs b/Simulator/Actions/RefinedTouch.cs
index f68c5ac..ced1f25 100644
--- a/Simulator/Actions/RefinedTouch.cs
+++ b/Simulator/Actions/RefinedTouch.cs
@@ -10,7 +10,7 @@ internal sealed class RefinedTouch() : BaseAction(
     public override void UseSuccess(Simulator s)
     {
         base.UseSuccess(s);
-        if (s.ActionStates.TouchComboIdx == 1)
+        if (s.ActionStates.Combo == ActionProc.UsedBasicTouch)
             s.StrengthenEffect(EffectType.InnerQuiet);
     }
 }
diff --git a/Simulator/Actions/StandardTouch.cs b/Simulator/Actions/StandardTouch.cs
index ca62358..b48dddd 100644
--- a/Simulator/Actions/StandardTouch.cs
+++ b/Simulator/Actions/StandardTouch.cs
@@ -8,5 +8,5 @@ internal sealed class StandardTouch() : BaseAction(
     )
 {
     public override int CPCost(Simulator s) =>
-        s.ActionStates.TouchComboIdx == 1 ? 18 : 32;
+        s.ActionStates.Combo == ActionProc.UsedBasicTouch ? 18 : 32;
 }
diff --git a/Solver/Simulator.cs b/Solver/Simulator.cs
index 7e63d3d..d32407e 100644
--- a/Solver/Simulator.cs
+++ b/Solver/Simulator.cs
@@ -84,12 +84,12 @@ private bool ShouldUseAction(ActionType action, BaseAction baseAction)
             return false;
 
         // don't allow combo actions if the combo is already in progress
-        if (ActionStates.TouchComboIdx != 0 &&
+        if (ActionStates.Combo != ActionProc.None &&
             (action is ActionType.StandardTouchCombo or ActionType.AdvancedTouchCombo or ActionType.RefinedTouchCombo))
             return false;
 
-        // only allow Advanced Touch when Observing
-        if (ActionStates.ObserveCombo && action is not ActionType.AdvancedTouch)
+        // when combo'd, only allow Advanced Touch
+        if (ActionStates.Combo == ActionProc.AdvancedTouch && action is not ActionType.AdvancedTouch)
             return false;
 
         // don't allow pure quality moves under Veneration
@@ -140,7 +140,7 @@ private bool ShouldUseAction(ActionType action, BaseAction baseAction)
 
         // don't allow Refined Touch without a combo
         if (action is ActionType.RefinedTouch &&
-            ActionStates.TouchComboIdx != 1)
+            ActionStates.Combo != ActionProc.UsedBasicTouch)
             return false;
 
         // don't allow Immaculate Mends that are too inefficient