i usually use 1 line of infantry supported by 1 line of cavalry and missile... with phalanx atleast. my infantry pins them down, my cavalry swoops down the flank and routs them. then I swoop my flanks around those still fighting in the middle, if they dont rout immediatly i charge in my missile, charge with my phalanx (using their swords) and charge in my general, they usually rout quite fast. then i hunt every thing down mainly using my cavalry and missile troops. i usually annihality 90% of the enemy.