There is certainly still rng and I don’t want to diminish the pain. However, if you’re following suggested mods, primarily right sets with CA arrows, you should have a good chance of winning.
I ran 2 x tenacity primary crosses instead of 1 ten 1 potency, protection primaries instead of health, had no speed on my potency CA arrow and still managed to go 3/3.
My last run was the only one I was in danger of losing. I’m not sure if it was rng or misplayed due to overconfidence. However, I still won while losing CHan before killing Vader. Obviously, I got Vader down before his next turn and rolo and 3po then cleared the troopers while actually gaining health.