Thinking, this needs to be Late War, couple of reasons:
Eastern Front Tank lists for Soviets are written around the old Hens & Chicks rule and the whole lists are unbalanced with the new rules, only really hits the tank lists as no one takes Mid War soviets with armour & hens & chicks in other lists.
Mid War you are going to need more points per German player if people want to run tiggers, and there is really only one Soviet list that can handle them mid war in the sort of numbers likely here.
Suggest using Grey Wolf & Red Bear (2nd) and running this late war, 2k per side, total war scenario (two objectives, capture one or break the enemy army by breaking more than half their companies, start 24" apart, table split in half randomly, objectives 24" back from the centre line to the back of the board. Recce companies etc arriving from reserves can arrive from any edge (will bring the book up anyway)