Palpatine Lead arena team question.

With what you have now, royal guard is a good beginning tank, but he falls out of viability quickly. I'd stick with him for now until you have Sion or some other tank. So Palpatine lead, royal guard, TFP, vader, and Bastilla fallen. I’d say tarkin, but dark Bastilla is a great character. You could also sub out TFP or Guard for tarkin. But when you get a zeta on Palpatine lead, vader is great to get the steamball rolling.