Build conscripts.
Put out conscripts.
Do deal with MGs, walk around behind them with conscripts.
Do that until you can spam T-34s. If you go with the ISU-152 guy I guess you don't get Hit the Dirt! so maybe this won't work.
This x10000.
Personal build:
3x conscripts + 1x Engie + Molotovs
T1 building + flamer on first combat engie
Scout car (with flamer engie for killing MGs and stuff)
Conscript
Sniper
2x Conscipts
Tier 3 Building
T34 spam
Make sure you have 5-6 conscripts and a sniper out at all times, and just spam T34s as needed. You should have 75% map control at which point it's just a rofl stomp.
Go with the infantry doc. for PPSHs and 'Hit the Dirt' (secret god-mode). Upgrade the to PPSH on ALL conscript squads.
Congrats you now have an 80% win rate.