Once you have applied the fix, protect your campaign with these DarthMod specific tips:
Go to:
C:\Users\[YourName]\AppData\Roaming\The Creative Assembly\Empire\scripts\preferences.script.txt
Find and change:
campaign_unit_multiplier 1; # was 0.75 or 1.0
Lower to 0.5 – reduces AI army sizes by 50% (still feels large in DarthMod).
Also set:
multithreaded_model_enabled true; # helps with turn processing