Thrawn Event 7* too hard - impossible to clear with reasonable gear and mods!!

It's just a matter of gear and mods. My Phoenix are all Gear 11, decent mods, cleared it on the first try. If your Zeb has enough potency, you can Stun your targets by having Hera and Ezra use their specials to hit with Zeb's basic as much as possible. Take out the Deathtroopers first, the other adds, then finally Thrawn.
Of course, a lot of people are going to say it's a waste to gear them up, but I'm hoping the Phoenix Squad will get some Zetas or improvements in the future. Getting Thrawn easily is just icing on the cake for me.