Really, I would just hope for bypassing this corridor.
If it comes to it, Yin-Yang Sanctifier Orb might make a forced fight easier just by hitting everything with dispel magic and some damage, but its damage against area stuff could be mostly nullified. Still works at half on the first target if it saves, but for an eighth level maneuver, its ability to reliably use its bonus damage isn't the best.
... though I wonder if I could use a PC as an improvised throwing weapon and the base damage that would cause?