diff --git a/app/Model/Attribute.php b/app/Model/Attribute.php
index 99830885d..236b9b7df 100644
--- a/app/Model/Attribute.php
+++ b/app/Model/Attribute.php
@@ -1944,6 +1944,9 @@ class Attribute extends AppModel
                     $attribute['Attribute']['data'] = $encodedFile;
                 }
                 if ($options['includeDecayScore']) {
+                    if (empty($attribute['Attribute']['to_ids'])) {
+                        continue; // It only makes sense to consider IoCs for the decaying
+                    }
                     $this->DecayingModel = ClassRegistry::init('DecayingModel');
                     $include_full_model = isset($options['includeFullModel']) && $options['includeFullModel'] ? 1 : 0;
                     if (empty($attribute['Attribute']['AttributeTag'])) {
diff --git a/app/Model/DecayingModel.php b/app/Model/DecayingModel.php
index 51d845de5..b1b6a6712 100644
--- a/app/Model/DecayingModel.php
+++ b/app/Model/DecayingModel.php
@@ -16,6 +16,9 @@ class DecayingModel extends AppModel
         )
     );
 
+    private $modelCache = [];
+    private $modelCacheForType = [];
+
     private $__registered_model_classes = array(); // Proxy for already instantiated classes
     public $allowed_overrides = array('threshold' => 1, 'lifetime' => 1, 'decay_speed' => 1);
 
@@ -263,6 +266,10 @@ class DecayingModel extends AppModel
     // - full attach Attribute types associated to the requested model
     public function fetchModel($user, $id, $full=true, $conditions=array(), $attach_editable=0)
     {
+        $cacheKey = sprintf('%s', $id);
+        if (isset($this->modelCache[$cacheKey])) {
+            return $this->modelCache[$cacheKey];
+        }
         $conditions['id'] = $id;
         $searchOptions = array(
             'conditions' => $conditions,
@@ -290,6 +297,7 @@ class DecayingModel extends AppModel
             $decayingModel['DecayingModel']['attribute_types'] = $this->DecayingModelMapping->getAssociatedTypes($user, $decayingModel);
         }
         $decayingModel = $this->attachIsEditableByCurrentUser($user, $decayingModel);
+        $this->modelCache[$cacheKey] = $decayingModel;
         return $decayingModel;
     }
 
@@ -612,11 +620,15 @@ class DecayingModel extends AppModel
         if ($model_id === false) { // fetch all allowed and associated models
             $associated_model_ids = $this->DecayingModelMapping->getAssociatedModels($user, $attribute['type'], true);
             $associated_model_ids = isset($associated_model_ids[$attribute['type']]) ? array_values($associated_model_ids[$attribute['type']]) : array();
-            if (!empty($associated_model_ids)) {
+            if (isset($this->modelCacheForType[$attribute['type']])) {
+                $models = $this->modelCacheForType[$attribute['type']];
+            } else if (!empty($associated_model_ids)) {
                 $models = $this->fetchModels($user, $associated_model_ids, false, array('enabled' => true));
+                $this->modelCacheForType[$attribute['type']] = $models;
             }
         } else {
             $models = $this->fetchModels($user, $model_id, false, array());
+            $this->modelCacheForType[$attribute['type']] = $models;
         }
         foreach ($models as $model) {
             if (!empty($model_overrides)) {
diff --git a/app/Model/DecayingModelMapping.php b/app/Model/DecayingModelMapping.php
index 5005766ea..13577ef6e 100644
--- a/app/Model/DecayingModelMapping.php
+++ b/app/Model/DecayingModelMapping.php
@@ -25,6 +25,8 @@ class DecayingModelMapping extends AppModel
         )
     );
 
+    private $modelCache = [];
+
     public function resetMappingForModel($new_model, $user) {
         if (empty($new_model['model_id'])) {
             throw new NotFoundException(__('No Decaying Model with the provided ID exists'));
@@ -76,6 +78,10 @@ class DecayingModelMapping extends AppModel
     }
 
     public function getAssociatedModels($user, $attribute_type = false) {
+        $cacheKey = sprintf('%s', $attribute_type);
+        if (isset($this->modelCache[$cacheKey])) {
+            return $this->modelCache[$cacheKey];
+        }
         $conditions = array(
             'OR' => array(
                 'DecayingModel.org_id' => $user['org_id'],
@@ -111,6 +117,7 @@ class DecayingModelMapping extends AppModel
         }
         $associated_models = Hash::combine($associated_models, '{n}.DecayingModelMapping.model_id', '{n}.DecayingModelMapping.model_id', '{n}.DecayingModelMapping.attribute_type');
         $models = array_merge_recursive($associated_default_models, $associated_models);
+        $this->modelCache[$cacheKey] = $models;
         return $models;
     }
 
diff --git a/app/Model/DecayingModelsFormulas/Base.php b/app/Model/DecayingModelsFormulas/Base.php
index 3d3af1c7c..7073a7950 100644
--- a/app/Model/DecayingModelsFormulas/Base.php
+++ b/app/Model/DecayingModelsFormulas/Base.php
@@ -133,9 +133,9 @@ abstract class DecayingModelBase
         }
         if ($last_sighting_timestamp === false) {
             $this->Sighting = ClassRegistry::init('Sighting');
-            $all_sightings = $this->Sighting->listSightings($user, $attribute['id'], 'attribute', false, 0, true);
-            if (!empty($all_sightings)) {
-                $last_sighting_timestamp = $all_sightings[0]['Sighting']['date_sighting'];
+            $last_sighting = $this->Sighting->getLastSightingForAttribute($attribute['id']);
+            if (!empty($last_sighting)) {
+                $last_sighting_timestamp = $last_sighting['Sighting']['date_sighting'];
             } elseif (!is_null($attribute['last_seen'])) {
                 $last_sighting_timestamp = (new DateTime($attribute['last_seen']))->format('U');
             } else {
diff --git a/app/Model/Sighting.php b/app/Model/Sighting.php
index 6f91868ba..3d5e1d0b1 100644
--- a/app/Model/Sighting.php
+++ b/app/Model/Sighting.php
@@ -1010,6 +1010,23 @@ class Sighting extends AppModel
         return $sightings;
     }
 
+     /**
+     * @param int $id
+     * @return array
+     */
+    public function getLastSightingForAttribute($id): array
+    {
+        $sighting = $this->find('first', [
+            'conditions' => [
+                'Sighting.attribute_id' => $id,
+                'Sighting.type' => 0,
+            ],
+            'recursive' => -1,
+            'order' => ['Sighting.date_sighting DESC']
+        ]);
+        return empty($sighting) ? [] : $sighting;
+    }
+
     /**
      * @param array $user
      * @param string $returnFormat