The issue of defining accurately the racial nature of steppes " tribes" is here to stay from wargaming conversations to academic research. In my modest opinion, I would suggest that it would have made most of these people laugh: you survived with courage and fought well, you were part of the band, maybe starting as a fighting slave and rising with your exploits. And there were those kids from captives, the good ones would come along as well. Then you have the court of Attila, very "global" indeed. The Gobi to Tarim hordes would porbably be a mixture of Tokharians, Turks, Mongols, and eastern Iranians. The ruling families would maybe separate one from another racially. And the major factor would be the common language adopted.
Talking about the Taiping and Boxer rebellions , did somebody mention the very nice Gringo 40 ranges in 28mm?
Philippe