So...I managed to beat the Quadomme by just shooting the Goozooka at her until she falls over. :v
(Note: NOT FOOLPROOF. May miss. Minimum of 3 shots, recommend at least a full stack of ammo.)
For the life of me, I can't seem to be able to find the Ornate Chest in Glacial Rift for some reason. I mean, I've checked the odds, and 4% doesn't seem to be that impossible...right?