I recommend you bring a force of yours to the quest. All It needs to do Is SD & Resta If needed, and you alone can deal with It np after a few tries and reading the rooms correctly.
I know It might be annoying to dual log and be switching between characters to make/join room twice and control two characters, but for what you are attempting to this Is no big deal (because seriously, the first two rooms are brimming with gi gues, for a reason the quest Is banned during Anniversary, though not because of gi gues but certain meris ) [..... oh wait, also because of Gi Gue as well, dropping SoU ]
Your worst enemy will be remembering to switch dropstyle to 0 (shared) and to remember to switch It back to 1 (Individual once you are done