diff --git a/scripts/hv-unified.user.js b/scripts/hv-unified.user.js
index c50bc6e..d87efb8 100644
--- a/scripts/hv-unified.user.js
+++ b/scripts/hv-unified.user.js
@@ -1006,11 +1006,14 @@ function strategyAdept() {
         }
     }
 
-    // 6. Spirit Stance at OC 60 — with cooldown to prevent flip-flopping
-    if (STATE.oc >= 60 && !STATE.spiritStance && STATE.sp > 0.10 && !STATE._spiritCooldown) {
+    // 6. Spirit Stance at OC 60 — only if we have enough SP to sustain it
+    //    Costs 1 SP + 10% OC per round (wiki formula)
+    //    Minimum 20% SP = ~10 rounds of sustain before we run out
+    if (STATE.oc >= 60 && !STATE.spiritStance && STATE.sp > 0.20 && !STATE._spiritCooldown) {
         STATE._spiritCooldown = 3;
         return { type: 'toggle_spirit' };
     }
+    // Toggle off when SP is critically low
     if (STATE.sp < 0.03 && STATE.spiritStance && !STATE._spiritCooldown) {
         STATE._spiritCooldown = 3;
         return { type: 'toggle_spirit' };
diff --git a/scripts/latest.user.js b/scripts/latest.user.js
index c50bc6e..d87efb8 100644
--- a/scripts/latest.user.js
+++ b/scripts/latest.user.js
@@ -1006,11 +1006,14 @@ function strategyAdept() {
         }
     }
 
-    // 6. Spirit Stance at OC 60 — with cooldown to prevent flip-flopping
-    if (STATE.oc >= 60 && !STATE.spiritStance && STATE.sp > 0.10 && !STATE._spiritCooldown) {
+    // 6. Spirit Stance at OC 60 — only if we have enough SP to sustain it
+    //    Costs 1 SP + 10% OC per round (wiki formula)
+    //    Minimum 20% SP = ~10 rounds of sustain before we run out
+    if (STATE.oc >= 60 && !STATE.spiritStance && STATE.sp > 0.20 && !STATE._spiritCooldown) {
         STATE._spiritCooldown = 3;
         return { type: 'toggle_spirit' };
     }
+    // Toggle off when SP is critically low
     if (STATE.sp < 0.03 && STATE.spiritStance && !STATE._spiritCooldown) {
         STATE._spiritCooldown = 3;
         return { type: 'toggle_spirit' };
diff --git a/src/strategy-engine.js b/src/strategy-engine.js
index d879721..4391f36 100644
--- a/src/strategy-engine.js
+++ b/src/strategy-engine.js
@@ -363,11 +363,14 @@ function strategyAdept() {
         }
     }
 
-    // 6. Spirit Stance at OC 60 — with cooldown to prevent flip-flopping
-    if (STATE.oc >= 60 && !STATE.spiritStance && STATE.sp > 0.10 && !STATE._spiritCooldown) {
+    // 6. Spirit Stance at OC 60 — only if we have enough SP to sustain it
+    //    Costs 1 SP + 10% OC per round (wiki formula)
+    //    Minimum 20% SP = ~10 rounds of sustain before we run out
+    if (STATE.oc >= 60 && !STATE.spiritStance && STATE.sp > 0.20 && !STATE._spiritCooldown) {
         STATE._spiritCooldown = 3;
         return { type: 'toggle_spirit' };
     }
+    // Toggle off when SP is critically low
     if (STATE.sp < 0.03 && STATE.spiritStance && !STATE._spiritCooldown) {
         STATE._spiritCooldown = 3;
         return { type: 'toggle_spirit' };