diff --git a/builder/doc.html b/builder/doc.html
index 9b735e8..0a52469 100644
--- a/builder/doc.html
+++ b/builder/doc.html
@@ -1376,6 +1376,7 @@
     <script type="text/javascript" src="../js/utils.js"></script>
     <script type="text/javascript" src="../js/build_utils.js"></script>
     <script type="text/javascript" src="../js/computation_graph.js"></script>
+    <script type="text/javascript">COMPUTE_GRAPH_DEBUG=true;</script>
     <!-- <script type="text/javascript" src="../js/icons.js"></script> -->
     <script type="text/javascript" src="../js/sq2icons.js"></script>
     <script type="text/javascript" src="../js/powders.js"></script>
diff --git a/js/atree.js b/js/atree.js
index 623aa29..540d679 100644
--- a/js/atree.js
+++ b/js/atree.js
@@ -403,6 +403,7 @@ const atree_validate = new (class extends ComputeNode {
                 reachable.add(ability.id);
             }
             if (atree_to_add.length == _add.length) {
+                atree_to_add = _add;
                 break;
             }
             atree_to_add = _add;
@@ -1143,6 +1144,7 @@ function generateTooltip(UI_elem, node_elem, ability, atree_map) {
     let apUsed = 0;
     let maxAP = parseInt(document.getElementById("active_AP_cap").innerHTML);
     let archChosen = 0;
+    let satisfiedDependencies = [];
     let blockedBy = [];
     for (let [id, node_wrap] of atree_map.entries()) {
         if (!node_wrap.active || id == ability.id) {
@@ -1152,6 +1154,9 @@ function generateTooltip(UI_elem, node_elem, ability, atree_map) {
         if (node_wrap.ability.archetype == ability.archetype) {
             archChosen++;
         }
+        if (ability.dependencies.includes(id)) {
+            satisfiedDependencies.push(id);
+        }
         if (ability.blockers.includes(id)) {
             blockedBy.push(node_wrap.ability.display_name);
         }
@@ -1182,6 +1187,18 @@ function generateTooltip(UI_elem, node_elem, ability, atree_map) {
         container.appendChild(archReq);
     }
 
+    // dependencies
+    for (let i = 0; i < ability.dependencies.length; i++) {
+        let dependency = make_elem("p", ["scaled-font-sm", "my-0", "mx-1"], {});
+        if (satisfiedDependencies.includes(ability.dependencies[i])) {
+            dependency.innerHTML = reqYes;
+        } else {
+            dependency.innerHTML = reqNo;
+        }
+        dependency.innerHTML += " <span class = 'mc-gray'>Required Ability:</span> " + atree_map.get(ability.dependencies[i]).ability.display_name;
+        container.appendChild(dependency);
+    }
+
     // blockers
     for (let i = 0; i < blockedBy.length; i++) {
         let blocker = make_elem("p", ["scaled-font-sm", "my-0", "mx-1"], {});
diff --git a/js/computation_graph.js b/js/computation_graph.js
index 0dcc8d8..d144e29 100644
--- a/js/computation_graph.js
+++ b/js/computation_graph.js
@@ -1,5 +1,6 @@
-let all_nodes = [];
+let all_nodes = new Set();
 let node_debug_stack = [];
+let COMPUTE_GRAPH_DEBUG = false;
 class ComputeNode {
     /**
      * Make a generic compute node.
@@ -21,7 +22,7 @@ class ComputeNode {
                                 // 0: clean
         this.inputs_dirty = new Map();
         this.inputs_dirty_count = 0;
-        all_nodes.push(this);
+        if (COMPUTE_GRAPH_DEBUG) { all_nodes.add(this); }
     }
 
     /**
@@ -34,7 +35,7 @@ class ComputeNode {
         if (this.dirty === 0) {
             return;
         }
-        node_debug_stack.push(this.name);
+        if (COMPUTE_GRAPH_DEBUG) { node_debug_stack.push(this.name); }
         if (this.dirty == 2) {
             let calc_inputs = new Map();
             for (const input of this.inputs) {
@@ -46,7 +47,7 @@ class ComputeNode {
         for (const child of this.children) {
             child.mark_input_clean(this.name, this.value);
         }
-        node_debug_stack.pop();
+        if (COMPUTE_GRAPH_DEBUG) { node_debug_stack.pop(); }
         return this;
     }
 
@@ -190,7 +191,7 @@ function calcSchedule(node, timeout) {
     }
     node.mark_dirty();
     node.update_task = setTimeout(function() {
-        node_debug_stack = [];
+        if (COMPUTE_GRAPH_DEBUG) { node_debug_stack = []; }
         node.update();
         node.update_task = null;
     }, timeout);