diff --git a/Resources/Prototypes/Entities/Mobs/NPCs/Rslimes.yml b/Resources/Prototypes/Entities/Mobs/NPCs/Rslimes.yml
index 0f50c62cf0..3512b51815 100644
--- a/Resources/Prototypes/Entities/Mobs/NPCs/Rslimes.yml
+++ b/Resources/Prototypes/Entities/Mobs/NPCs/Rslimes.yml
@@ -228,19 +228,17 @@
     startAnnouncement: true
     earliestStart: 20
     reoccurrenceDelay: 12
-    minimumPlayers: 1
+    minimumPlayers: 30
     weight: 6 # Really weak compared to other critters
     duration: 60
   - type: VentCrittersRule
     entries:
-    - id: ReagentSlime
-      prob: 0.002
     - id: ReagentSlimeBeer
-      prob: 0.002
+      prob: 0.003
     - id: ReagentSlimePax
-      prob: 0.002
+      prob: 0.001
     - id: ReagentSlimeNocturine
-      prob: 0.002
+      prob: 0.001
     - id: ReagentSlimeTHC
       prob: 0.002
     - id: ReagentSlimeBicaridine
@@ -250,7 +248,7 @@
     - id: ReagentSlimeNapalm
       prob: 0.002
     - id: ReagentSlimeOmnizine
-      prob: 0.002
+      prob: 0.003
     - id: ReagentSlimeMuteToxin
       prob: 0.002
     - id: ReagentSlimeNorepinephricAcid
@@ -258,7 +256,7 @@
     - id: ReagentSlimeEphedrine
       prob: 0.002
     - id: ReagentSlimeRobustHarvest
-      prob: 0.002
+      prob: 0.003
     - id: ReagentSlimeIchor
       prob: 0.002
     - id: ReagentSlimeBleach
@@ -270,20 +268,20 @@
     - id: ReagentSlimeBuzzachloricbees
       prob: 0.002
     - id: ReagentSlimeWehjuice
-      prob: 0.002
+      prob: 0.003
     - id: ReagentCognizine
-      prob: 0.002
+      prob: 0.003
     - id: ReagentSlimeNecrosol
       prob: 0.002
     - id: ReagentSlimeSpaceDrugs
-      prob: 0.002
+      prob: 0.003
     - id: ReagentSlimeUnstableMutagen
-      prob: 0.002
+      prob: 0.001
     - id: ReagentSlimeLead
-      prob: 0.002
+      prob: 0.001
     - id: ReagentSlimechlorinetriflouride
       prob: 0.002
     - id: ReagentSlimePotassium
       prob: 0.002
     - id: ReagentSlimeLotophagoiOil
-      prob: 0.002
+      prob: 0.001
diff --git a/Resources/Prototypes/Entities/Mobs/NPCs/xenopet.yml b/Resources/Prototypes/Entities/Mobs/NPCs/xenopet.yml
index 09dd78c6c0..e6dde1e554 100644
--- a/Resources/Prototypes/Entities/Mobs/NPCs/xenopet.yml
+++ b/Resources/Prototypes/Entities/Mobs/NPCs/xenopet.yml
@@ -352,16 +352,14 @@
     duration: 60
   - type: VentCrittersRule
     entries:
-    - id: MobXeno
-      prob: 0.01
     - id: MobXenoNeutralRouny
-      prob: 0.005
+      prob: 0.0075
     - id: MobXenoNeutralDrone
-      prob: 0.005
+      prob: 0.0075
     - id: MobXenoNeutralPraetorian
-      prob: 0.005
+      prob: 0.0075
     - id: MobXenoNeutralRavager
-      prob: 0.005
+      prob: 0.0075
       
 - type: entity
   id: ArgocyteVents
@@ -372,37 +370,35 @@
     startAnnouncement: true
     earliestStart: 20
     reoccurrenceDelay: 12
-    minimumPlayers: 12
+    minimumPlayers: 30
     weight: 6 # Really weak compared to other critters
     duration: 60
   - type: VentCrittersRule
     entries:
-    - id: BaseMobArgocyte
-      prob: 0.01
     - id: MobArgocyteSlurva
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteBarrier
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteSkitter
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteSwiper
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteMolder
-      prob: 0.01
+      prob: 0.003
     - id: MobArgocytePouncer
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteGlider
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteHarvester
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteCrawler
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteEnforcer
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteFounder
-      prob: 0.005
+      prob: 0.003
     - id: MobArgocyteLeviathing
-      prob: 0.005
+      prob: 0.0001
 
 - type: entity
   id: MeatVents
@@ -413,13 +409,11 @@
     startAnnouncement: true
     earliestStart: 20
     reoccurrenceDelay: 12
-    minimumPlayers: 12
+    minimumPlayers: 20
     weight: 6 # Really weak compared to other critters
     duration: 60
   - type: VentCrittersRule
     entries:
-    - id: BaseMobFlesh
-      prob: 0.01
     - id: MobFleshJared
       prob: 0.005
     - id: MobFleshGolem
@@ -457,7 +451,7 @@
     startAnnouncement: true
     earliestStart: 20
     reoccurrenceDelay: 12
-    minimumPlayers: 12
+    minimumPlayers: 20
     weight: 6 # Really weak compared to other critters
     duration: 60
   - type: VentCrittersRule
@@ -467,11 +461,11 @@
     - id: MobCarpMagic
       prob: 0.01
     - id: MobCarpHolo
-      prob: 0.01
+      prob: 0.002
     - id: MobCarpRainbow
       prob: 0.01
     - id: MobShark
-      prob: 0.01
+      prob: 0.002
     - id: MobCarpDragon
       prob: 0.01
 
@@ -484,7 +478,7 @@
     startAnnouncement: true
     earliestStart: 20
     reoccurrenceDelay: 12
-    minimumPlayers: 12
+    minimumPlayers: 20
     weight: 6 # Really weak compared to other critters
     duration: 60
   - type: VentCrittersRule
@@ -507,7 +501,7 @@
     startAnnouncement: true
     earliestStart: 20
     reoccurrenceDelay: 12
-    minimumPlayers: 12
+    minimumPlayers: 20
     weight: 6 # Really weak compared to other critters
     duration: 60
   - type: VentCrittersRule