Wasn't playing any of German states in this mod, but from my experience Red Germany is kicked by two remaining contenders within a year. Then Westphalia was always winning and unite german lands very fast. Alto it's fairly easy to keep them all in fight for years :) by supplying simplest weapon first too Reds and if they grow too strong then Westphalia for a bit - nationalist Germany usually don't need support. Clue is not to let Reds to fall - they have a lot of units etc. but for some reasons they're loosing from beginning (organization of units? Fighting two enemies? - usually Westphalia and that nationalist East Germany don't fight much till "commies" fall). So at the end it's very nice to have three sides civil war in Germany from start and ability to influence it.