'Chazing Meta' is not the point here, you need an arena team that is farmable at different spots simultaneously, the scoundrels for credit heist, the ships for fleet arena and the zeta challenge and basic Jedis for the mod store / 5* mods. And the EP event needs 5 rebels.
This is combined here. Wiggs are still good pilots, Ahsoka too, her and JC are Jedi for the challenge, Lando/Boba/STH scoundrels, Ackbar a rebel and fleet commander. So mostly dual purposes.
SF has the advantage to have cheap plans, they come in the GW. He saved my arena rank in the time I used double tank, and is my tank atm. Totally great against the omnipresent Chaze.
One of my guild mates uses B2 successfully (#1 each day) so go for his shards but be careful not to gear too many toons at once. I will skip B2, next tanks will be GK or Baze. In the meantime I will continue to gear RG, for a PalpaTIE team (EP, TFP, RG, SF, STH), for P3 hAAT.