i made a custom battle the other day myself as russia versus ai poland. I had 1 catapult 1 ballista 2 siege towers 1 ladder and a battering ram. i sent my 2 siege towers and ladder to the same wall (all manned by heavy inf) and a peasant manned battering ram to the gates. As my battering ram neared the gate fire arrows started popping out the towers. I thought my battering ram must survive time for my first offensive. I set my catapult to flaming missiles and hit it to fire at the tower, the shot missed flew staright down thes street and hit the enemy general bang on the head . i send in my ballista and archers using flaming missiles and my heavy cav and within seconds the enemy army has routed!!!!!!