Okay so here were my three most recent Cradle practice runs.
First run, the group wiped on the elevator.
Second run, the group actually made it to the boss, and to first push/pull, but I got proned right when pull started, so prone + pull means I got dragged in. Didn't get to practice push at all.
Third run, group got to boss, but wiped before first push/pull.
At this rate, maybe I will master it by Mod 35.