Ambush: The easiest way of eliminating enemies, especially if you got lots of cavalry. Then, if you got lots of cavalry, everything is easy. I mean, a long thin line of enemy soldiers to be attacked from all sides...piece a cake.

Attack: Depending on units in your army. As getai, I prefer to go on the offensive with my falxmen as they cut through any lines. Take that you stinking romans...

Defense: Spearmen, hoplites or phalanxes in your army and defense is the best choice to combat. The AI ain't that clever to flank you and while your main line keeps the enemy occupied, you move around your cavalry and charge them in their backs.