Guard Motor, both ISU, Shock Rifle (4) are the topnotch due to tank call ins. But then we have situational commander such as:
-Counter attack
-Shock Army
-Terror
-Advance Warfare
Then we have the not totally useless such as
-Lend lease
-Guard Rifle
-Armored Assault
And i'm not sure how to qualify Urban defense or SI (some maps, some strats, some modes may work)
I think any changes to the B4 would make the whole commander to be useless. The whole point of the B4 is to take on OKW's heavy monsters.
Randomly looks at Barton's game with KV1, shocks and FMR, no B4.