Huns' units aren't that great, but you can make full population limit without having to build houses since they were more nomadic I suppose. I think Mongols might be the same. I usually play as Britons or Teutons.
I played a couple games earlier today with a friend and we did pretty good in a 2v2 against 2 hards, but I still can't seem to beat human opponents, which is odd because my total score was 10k higher than my friends, I was the one most of the computers' attacks were directed at, and I held them off and killed their king. Idk...
I don't think I can play tonight though because I have work in the morning and I don't want to be up until 11:30 (Spook and y00tz. lol)