A strategy I have used effectively as Germany calls for a fairly heavy ART/INF mix with lots of FTR.
Essentially, rather than going for an all out kill of USSR, Germany instead treats the Eastern front as an active defense zone. Only send enough forces east to keep the USSR in active contention for KAR, BEL and UKR. Germany should be in possession of these territories at the end of each turn with minimal forces and plenty of INF and ART lined up for the counter attack. This keeps German supply lines short and holds the USSR army some distance from defending MOS. The IC point count for the Eastern Front remains relatively static but USSR is losing turf to Japan every turn. ARM is held back (in EEU) for the times when it is really needed and then it should be in a stack with a lot of INF as fodder. Keep your eye open for the lightly defended ARC. Nothing sweeter than an ARM push to Moscow. You will probably lose more IC in ARM than you get in captured IC but it will certainly refocus an over extended USSR.
Turning the Eastern Front into a war of attrition with the German playing defense really chews up USSR resources. BTW, never let the USSR player keep a FTR long. You can’t afford the mobility it gives him. He has to be forced to commit ground forces toward Germany so Japan has a fast track to Moscow.
I’ll leave to your imagination what those extra resources not dying in the fourth retaking of CAU can do to the UK and US. Personally, I love African diamonds, Brazilian women and Cuban cigars …
INF and ART on the Eastern Front is definitely an viable option.