Palpatine team for Mid Game

I’m at around level 80 and my Palaptine event is tomorrow. I’ve been working for awhile to get him and Thrawn and believe my Phoenix Squad is up to the task of getting them both at 7 stars. I also have a Tie Fighter Pilot, GMT, DV at 7 stars. I plan to have Bastilla Shan Fallen on offense while using RG on defense. I have Bastilla at 4 stars but at around 9500 power with the mods I put on her. My end goal is getting Traya and swapping in the sith. Is this a good long term strategy? Right now I’m sitting in the 100’s of my arena shard but haven’t sniffed anything under 50. Is this a good long term strategy to climbing my arena? Thanks for any help