Yoinked it from Redux_99_P.pak using UnrealPak.exe, now you can do raid boss rush in vanilla! Also included crit text improvement for my own purposes but I could also make a version with just raid boss rush.

Couldn't figure out how to get the skellys to spawn but you can kill the purple crystal enemies to clear the round, there is 1 in each map.

Credit:
https://github.com/BLCM/wlmods/wiki/Wonderlands%20Redux
https://www.nexusmods.com/tinytinaswonderlands/mods/47