The only bit that truly worried me is that whole 

[quote]Cyclone: It makes the Rukbans have 10x the population of any other region

Kho: then the other regions are not realistic[/quote]

business.

Other than that, and the fact the Mongols had objectively better technology and medicine than the Huns, I find this all very hard to judge.

But yeah, 50,000 soldiers is way too much, I don't think Lifprasil will have that same force, for example. It is not something I would like to see other players going around with, especially when most of the world doesn't even have agriculture and very limited animal domestication.

Though I do not know much about steppe demographics, especially deep into the ancient era.