ORIGINAL: veritech
in real life the germans killed the russians at a 15 to 1 ratio witch is hard to replicate in the game .
As a blanket statement, I must contend that figure. Undoubtably there were some engagements which produced such ratios, but they were by no means standard. Against experienced, well equipped Russian formations Germans had no such huge advantage. If you look at major operations like Citadel for the Germans and Bagration for the Russians, the losses are not disproportionate for either side.
In-game, if the Russian chooses to build huge militia armies, then you'll achieve something similar to the kind of ratio that the Wehrmacht achieved early on in Barbarossa.