Tried it on (somewhat) higer levels, and it works like a charm. I added a potion of glorious vaulting, for good measure. Cleared out Nere and compatriots in two turns just just hopping about like a rabbit.
I didn't know there was a non-burning Waukeen's Rest. I just cast 'create water' on one character, preferebly someone with Magic Missile to nuke the doors. Haste that character and go into turn-based mode. Easy-peasy. Dash, here, jump there.