Taking out the enemy is so incredibly easy. Even at the highest level. Try this at turn one. After moving your worker, give your warrior the best attacking promotion available and attach yourself as leader. Use your scout to find an enemy location. Then move your warrior in to attack. It always works. After you have taken over this location, find another with your scout. Get another settler from your starting location and buy enough food from your second one to get a slinger. The warrior alone may be enough to take out a second spot but the slinger will assure it. And another. Keep sending settlers out from your first city. Attack. Attack. Attack. After about six cities it gets boring.