I think the best way to achieve a quick victory is by creating a mixed arms army according to the "Hammer and Anvil' concept. First you soften up the opponent with missile troops. Then make contact with his main line and hold it steady while assaulttroops attack the flanks of the enemies line. At the same time your cavalry circled around the enemy, and the missile troops let loose their remaining arrows (best is in the flanks or backs). When you cavalry is in position they charge and job is done by achieving one great big encirclement.