I managed to clear it using 7* Teebo, ES, EE; 6* Chirpa; 4* Logray (all g8 and with mostly 1/2* mods). That said, it was super hard and probably took me 6 or 7 tries, but I wasn't wanting to invest much more in Ewoks (who just don't do great in any other game mode right now) or move arena mods around.
For me, the trick was using Teebo lead. I tried a lot of times with Chirpa and just got wrecked over and over. When I switched to Teebo, things started going much better—just having more consistent TMR saved me.
I'm pretty sure Paploo and Wicket are much stronger than Logray, but he was all I had. (I missed the marquee events and had to farm Logray from the guild store.) I was sometimes able to time Logray's team foresight to save me from a few AT-ST AOEs, and his first special gave me an extra TMR when Teebo wasn't up yet. And speed on EE does count: you need as many cleanses and revives as possible
And yes, the recon troopers seem to be the biggest threat. Go for them first if you can.
Other than figuring out to use Teebo lead (for me), I just had to keep trying and hope for RNG to come out in my favor. Best of luck!