I was digging through the archives and folks say the best way is to do the climber mode instead of endurance. You can bank every round and just bail if you find a boss you don't like. (since you have been doing endurance anyways that doesn't seem to be an issue)
They say if you have all the random nerfs activated Penance Queen comes up often. She only appears after the 5th kill, I think that applies in both modes.
I remember when I was doing this years ago, I always did climber mode and had no real problem finding the queen.
12-Apr-2023 14:40:34