I’ve been building primarily Inf with 1 or 2 tanks each round on avg. Rushing headlong for Mos got me solidly into Caucasus but Mos is too fortified to crack, and US/UK are starting to land serious units in Norway / Karelia / E. Europe so Germany will have to concentrate on the homefront.
Fortunately the IC in Caucasus (and Jap ICs in India and FIC) mean the supply line is less vital. Also, Japan just recaptured 8 IPCs of land in Africa for the Axis.
I think a rush for Moscow is a risky strategy no matter what, but esp. without extra income from Africa. If you can get Caucasus though and Japan is already nearby that’s decent.