Which omegas to prioritize for the thrawn event?

All uniques need doing, basics/specials are nice, get them up to needing an omega, using chopper makes it easier but be prepared for a nightmare, it literally took me every day of the last event to do the final round, doing 20/30 replays every day and just at the point where I was giving up I did it, frustrating as hell but you’ll get there, I had Sabine and no chopper so it was allegedly harder to do, but there you go..