I really like ostruppens against USF.
3 Ostruppens, 2 HGM´s into fast 444.
Get as much map as possible, plant tellers try to lure stuart, backtech fausts if needed and secure your fuel with HMG.
Then drop 50 fuel there (you saved a lot mp by going ostruppen) and quickly tech for oswind. If everything go well, you will get oswind before 8-9 minute mark, completely hardcountering USF army composition
This is very good strategy, normally I like to play with Panthers or Panzer IV.