the Sarmatians would on principle IMHO require a set of headhunting teenage girls.. that did not consider a girl eligible for marriage until she'd brought back the head of an enemy (similar to the way girls have traditionally been raised in my wife's family..
Well, that explains the 'high' pitched voice I suppose.
But on the joking.. uh serious side, 'Lou' I like the idea but Im thinking 'so far' with the Ancient German, German Cav, Celts and Ive been informed with a combination of the two, you could even 'kit bash' Gauls. So IMO the Romans seem to have various enemies.
However, other than the Persians and the Numidians which seem to work pretty good as generic ancients for a variety of nations, the Greeks dont reallly have many opponents. Of course as I have said before, the greatest thing (to me) about the Greeks, they were often their own enemy. Sparta vs. Athens was fairly common it seems.