Great guide, but I have something to add.
1. Make sure that Chopper or Ezra goes into phrase 4 with at least 70%TM. The amout of pre-battle TM you get is exactly the end-turn TM of phrase 3. This way they can dispel as soon as possible. The same law appies for galactic war.
2. Start Kanan's turn with taunt and Hera's with putting backup plan on him. If Thrawn fractures anyone else, you're done for.
3. Reduce the damage of the Deathtroopers as much as possible. Both Deathtroopers start with their special buff. Stun lock one of them until you kill him. For the other one, dispel his special buff with Zeb's stagger and reduce his damage with Kanan's offense down.
4. Never attack Thrawn unless he's dazed. It's very difficult to stun him, but dazing is possible. It keeps him from counter attacking.
5. If you're powerful enough, and you want to avoid unnecessary risks, kill Thrawn before the stormtrooper commanders. The commanders actually doesn't heal Thrawn for a lot. The longer Thrawn is alive, the more chances that he'll kill one of you. Very useful tip if you want to three-star the event.
6. Do not underestimate Kanan's offense down. It's very useful.
7. Do not waste Ezra's Flourish unless stormtrooper is dead. You don't want Thrawn to use grand admiral's command and let him taunt again.
8. Use Zeb and Kanan's to keep Hera and Ezra alive. For Zeb, try to get retribution instead of tenacity up. It helps a lot to have Zeb counter-stun and counter-daze everyone. Ezra with a counter is deadly as well.
Hope it helps!
