I find it very hard countering these sort of units as the soviets. My AT guns may kill a bunch of tanks, but then eventually gets decrewed (which is very hard to recrew) and it almost always seems no matter how many tanks or vehicles i kill, the computer just manages to spam tons of them to the point where its stuck to either a stalemate, very slow advance, or pushing me back. Any tanks i get will be vulnerable to the massive amounts of cloaked paks, or stugs/geschultz, there will no matter what always be atleast a few of these even though i take lots down, they just easily get rebuilt again. I hope im not the only one whos having a very hard time with them. i would also like to add the AI builds a MG bunker guarding lots of the important fuels early game.