I was able to complete the event fairly easily with the following squad :smile:
HK47 (L) G8 Lvl 77
IG-88 G8 Lvl 80
IG-86 G8 Lvl 80
RG G X Lvl 80
Snowtrooper G8 Lvl 70
The AoE helped massively. I was able to just auto the first tier, but I had to actually play the 2nd tier in order to time the AoE.
In my modest opinion, you need the AoE to keep your troops alive for the first battles, as well as some kind of stun ability to stop that Ewok Elder from resurrecting the world and its mother in the last battle.