When Soviet teammate is present, choose Special Weapons Regiment and proceed by spending all your munitions on Vickers K LMG's for conscripts.
Vanguard Operations is my favorite because of the glider. Basically plops down an OKW Battlegroup HQ wherever you want that spits out commandos. Hope its actually given a real price tag instead of being 3x resource efficient for what it does, basically win by having tons of free airlanding officers. And of course the Croc (in combination with Hammer) and the combo rocket+AI typhoon strafes.
Agreed Special Weapons Regiment is the best for 2v2s with a soviet teammate. I hope they have nerfed ambush though