In the arena battles Barriss is my leader, then I'm using Asajj, talia, Luke, and nightsister I .. They are all 5 or 4 star and my group power is almost 13k .. Talia and my nightsister kinda suck no matter how much I level them up. I have stormtropper Han, chewie, Ahsoka, and JC to replace them. So who should I replace / level up? And should I have a different leader?