It varies from faction to faction. As the Getae(sp) I conquered the area North of the black sea. I build a level 4 government and level 4 MIC. I could have Hellenic spear men, hoplites and Skythian Nobles, along with the typical levies. Those Skythians were better than anything I could field and it was good to have some mobile infantry with armour. I love the flax troops but they get decimated by enemy fire and since most foes have javelins...