You cant get 100%, Simetrical, 70% is the max and that still means you always need 1 turn to build. Units that normally cost 3 turns to build (max) cost 1.


As for the cav armies, i play with a self-imposed maximum of 25% cavalry. It's more authentic, more fun, and you actually get battles, instead of mow-downs.

If i were playing with Scythia i would consider all cav armies. If not, then no.