I'm starting to see a lot of Rogue One teams in my second account's arena so I put together a team to take it down.
Lando (L), STH, Boba, Phasma, Barris.
I put all of my best speed mods on Boba to make sure he go first and then StHan so he can get his taunt up quickly. Then I just spam Lando's and Phasma's AoE (usually lands 2-3 speed down on them), forcing Baze and K2 to counter against StHan and feed me TM. After that I drop Phasma's victory march so basically my main damage dealers gets almost 3 whole turns while the enemy are still on turn 1. By this point Chirrut and Cassian/Jyn would be dead from Lando's AoE and Boba's execute/double tap so it's just a matter of mopping up.
Granted this account is on a shard that's level 60-65 currently so we will have to see what happens as they hit higher levels. Probably won't work as well but I'm close to unlocking Wedge so it looks like I'll be making changes to my team anyway.