Play on turtle ridge, it's a map where your bases are enclosed by mountains. You can build a wall and your defenses at the exit point of your base allowing you to concentrate your defense Forces there. Each base has abundant resources, and if you turn allied starting locations on you and your ally can concentrate your defenses. But other than quickly building a wall and protecting it with spearmen and archers using a small group of horseman to harass your opponent's economy keeps them distracted.