diff --git a/Resources/Prototypes/DeltaV/GameRules/events.yml b/Resources/Prototypes/DeltaV/GameRules/events.yml
index bb120890fa5..02e5ae089ed 100644
--- a/Resources/Prototypes/DeltaV/GameRules/events.yml
+++ b/Resources/Prototypes/DeltaV/GameRules/events.yml
@@ -49,7 +49,7 @@
   - type: PrecognitionResult
     message: psionic-power-precognition-xeno-vents-result-message
   - type: VentCrittersRule
-    table: !type:GroupSelector # DeltaV: EntityTable instead of spawn entries
+    table: !type:GroupSelector
       children:
       - id: MobXeno
         weight: 0.55
@@ -80,7 +80,8 @@
   - type: PrecognitionResult
     message: psionic-power-precognition-mothroach-spawn-result-message
   - type: VentCrittersRule
-    table: # DeltaV: EntityTable instead of spawn entries
+    playerRatio: 15 # mothroaches aren't dangerous, but don't need as many as mice
+    table:
       id: MobMothroach
 
 - type: entity
diff --git a/Resources/Prototypes/GameRules/pests.yml b/Resources/Prototypes/GameRules/pests.yml
index e156211e367..829b6028d02 100644
--- a/Resources/Prototypes/GameRules/pests.yml
+++ b/Resources/Prototypes/GameRules/pests.yml
@@ -31,6 +31,9 @@
   - type: PrecognitionResult # DeltaV - Precogniton
     message: psionic-power-precognition-mouse-migration-result-message
   - type: VentCrittersRule
+    min: 3 # DeltaV
+    max: 4 # DeltaV
+    playerRatio: 8 # DeltaV: Mice aren't dangerous
     table: !type:GroupSelector # DeltaV: EntityTable instead of spawn entries
       children:
       - id: MobMouse
@@ -54,6 +57,9 @@
   - type: PrecognitionResult # DeltaV - Precogniton
     message: psionic-power-precognition-king-rat-migration-result-message
   - type: VentCrittersRule
+    min: 3 # DeltaV
+    max: 4 # DeltaV
+    playerRatio: 8 # DeltaV: Mice aren't dangerous
     table: !type:GroupSelector # DeltaV: EntityTable instead of spawn entries
       children:
       - id: MobMouse
@@ -77,6 +83,7 @@
   - type: PrecognitionResult # DeltaV - Precogniton
     message: psionic-power-precognition-cockroach-migration-result-message
   - type: VentCrittersRule
+    playerRatio: 8 # DeltaV: Cockroaches aren't dangerous
     table: !type:GroupSelector # DeltaV: EntityTable instead of spawn entries
       children:
       - id: MobCockroach
@@ -97,6 +104,7 @@
   - type: PrecognitionResult # DeltaV - Precogniton
     message: psionic-power-precognition-snail-migration-result-message
   - type: VentCrittersRule
+    playerRatio: 20 # DeltaV: Snails aren't dangerous, but they should be more special
     table: !type:GroupSelector # DeltaV: EntityTable instead of spawn entries
       children:
       - id: MobSnail
@@ -118,6 +126,7 @@
   - type: PrecognitionResult # DeltaV - Precogniton
     message: psionic-power-precognition-snail-migration-result-message
   - type: VentCrittersRule
+    playerRatio: 20 # DeltaV: Snails aren't dangerous, but they should be more special
     table: !type:GroupSelector # DeltaV: EntityTable instead of spawn entries
       children:
       - id: MobSnail