Gohtzan Infantry are virtually the same thing as the Uhran Infantry that you fight at the Ceremonial Amphitheater of the Sky. You'll face them at the same time that you face some Uhran Infantry, and the battle is set up in a triangle formation. On each of the enemy's turns, they'll either attack you or each other. It's random. This means that every so often you'll luck out and get a round where they hurt each other while you take no damage. To increase the chances of this happening, take the teams out evenly: One Gohtzan, one Uhran, one Gohtzan, one Uhran, etc. If one team is taken out completely while the other is still standing, all attacks of the living team will be focused on you, and that's not good. Their attacks are only 100-150 or so, but the damage adds up.