you cant be serious?
marked plus 85's isn't enough. unless the ele/JT is right outside the sov base
Yes, guards motor shits all over most strats and against OKW it's brokenly OP. JT won't do shit when your entire army has been blasted by a 120 the whole game and you've been fighting T-34/85's with no armour while you save up for the most expensive vehicle in the game.
Only time a heavy TD is viable is if your opponent call-in stalled and built nothing but IS-2/ISU's. (and even that is map dependant, against IS-2's on any remotely urban map you are still fucked)