Best squad arena for low-level alt?

I'm running a new alt for the New year and am doing the standard phoenix start -> cls route. Typically doing this route I would use phoenix as my squad arena until I got Palpatine and Vader, but the other day I realized that the game with the new starting characters gives you for free 4 different empire characters Tarkin, TFP, Dark Trooper, and Gideon as well as I have recently pulled royal guard completing a full empire squad.

Every character is g5 so levels are equalized if that changes anything or not

Which would be a better team in SA until I can get the better palp lead empire squad? Many thanks in advance