The mobula is the only ship in the game you can have two completely different sets of weapons pointed in the same direction.
First off, hull engineer gets an artemis on bottom, and doesn't leave it even at close range (good for precision disables) except to repair the hull. Balloon side engi starts on top of the wing with an artemis, then jumps down to the carronade for when things get close and you need to get them below you. Third engi/gunner takes the top mercury until they don't have arcs, then jumps to the top of the wings and either takes the balloon side top artemis or the hull side top gatling.
Also, totally agreed on claw being a waste of time. If you have to turn more than 90 degrees one of two things is happening. Either you are moving into cover from enemy snipers or you are being ambushed. If you are moving into cover, you don't need the extra turning speed; if you are being ambushed, you are either dead or your enemy is not a threat to you at all.