- Having BP 4 up for German Heavies, BP 3 for other call-ins is viable and doesn't cost the players much fuel.
- Must have T3 or T4 built for Soviets before being able to call-in doctrinal armor.
- Each doctrinal armor should decrease the fuel income while it's on the field to prevent spam of call-ins, for example -50% while having a Tiger.
- Hardcapp call-ins which is more sillier tbh, like how it was done in vCOH.