Originally Posted by The Unknown Guy
The Prononai Kavalliori Toxotai in Medieval´s pocket mod. AKA: byzantine cavalry on steroids. Of course, they´re also horribly expensive (l20 upkeep cost), so its not like you can field entire armies of them. Still, two units as battle assistance are enough to turn the tide, since you can pepper with arrows the enemy to follow you into position (into the position you have placed your archers, ideally), and then hold them there with some melee unit, while slamming the cavalry at their rear.