Hey Ajaxfetish,

You just need a better mix of troops. You have to have archers, spears, shock and cavs. Here's an good mix: 4 archers, 5-6 spears, 2 urban militia, 2 militia sergeants, 1-2 steppe cavalry, 1 royal knight general.

- Like bretwalda said, use the cavalry to chase
- coordinate your army as a whole, don't break them up.
- most importantly, lower your troop fatalities so you won't need reinforcements at all. Always aim for the "instant rout", meaning when you pin an enemy unit, you must flank immediately. Once you get used to it, you won't need reinforcements at all.

Lastly, use archers to reduce enemy numbers but that's it. Say you want to rout an Almohad urban militia. Shoot them until they are down to ~80 soldiers. Pin with a spear, then flank with a cavalry on wedge at the back. That AUM unit is done. Halt your spear, chase with cav, then pick another unit.