Yeah the kill rate mod is the only thing needed IMO - the running and all that is fine for me. The Cav are insane-fast and the charging is rather quick as well but the units tend to get tired out really quickly if you just run them around like that.

As it is I'm lucky if I don't press the "Three TImes Faster" button. I like the vast expanse of the land and I've gotten fully used to the running speed. I'm still getting used to the killing speed though.