With a good handling, a sandwich charge (2 units charge against 1 target) from basic greek Hippeis can take down Sauro Bodyguards, noble cav, and Saka Cataphracts rather easily.... My Bosophoran experience proves that 3 or 4 Hippeis is all those cav that u need to kill enemy melee cav (but with proper usage of Hoplitai and Sphendenotai too...)