Today I managed to earn the max reward crate, achieving every feat on every stage. It took some runs for the last stage, though my CLS (with a pinch of rng) managed. Let's see the last stage of the event:
Here you see that you face a nearly max reliced classic empire team with all the zetas.
Yes, the classic Cls. G12, chewpio only g11 and 6*. So the fight:
I stun the Starck first with Han. Then I use my CLS's second ability on Vader.
After this I stun Vader too with Han's stun.
Chewie's AOE destroys the weakened Vader, while Starck is still stunned.
Focus and kill Starck.
Use C3PO to focus on EP
As soon as EP is gone, and every rebel is alive, the event is yours. Wear down Gideon and the other guy.
Now you see that it is a good event for such a team, CLS is able to beat it 100% without G13 and relics.