I was a bit weary of resource management, given that Gnome Priest has pretty piss poor damage output outside of fighting undead and that affects your ability to consume popcorn. I was getting antsy with about 2/3rds of the map explored and neither boss located, but then I found the altar of Dracul and I knew I was set. With agnostic collar in the shop pool, the piety and indulgence required to make best use of GG->Dracul conversion chain was assured. I found the bosses with only a handful of tiles left for exploration, but with the staying power of Dracul I didn't even need to start dipping into my mana-based resources. I used one mana potion to trigger my trisword (and I converted one under GG for some piety) and that was it.
Not impressed with my time today; I was overly-conservative with WEYTWUT and positioning to prevent shifting passages from closing in. The dungeon was still almost completely barren when I ended, so I didn't need to be nearly this thorough.