Personally I would go for Resistance and Finn Zeta. They're not really a great arena team because it takes legitimate thinking on who to attack and expose and when to use what skill, but that's what makes them extremely fun. You have to think about it, but when you do they're basically unstoppable! I don't have them yet myself to that point, but I started a thread about them a while back, and got a lot of really interesting results there: https://forums.galaxy-of-heroes.starwars.ea.com/discussion/84359/finns-zeta-and-resistance-squad/p1
