Cleared Stoneless!
https://prnt.sc/l6ywn4This time, I didn't throw away the run.
Notes on the run:
This run was very difficult! I think the last time I put so much effort into a run was VGT Rat. Even Heretic Gold and Curious VGT were easier for me.
The bosses in this dungeon are really, REALLY nasty. Leveling is easy, navigation is possible. Of the two bosses, one presents a high stat bar (you can't regen fight Prototype 3) and the other requires a lot of blackspace, and also a method of overcoming Unstable. Lusory himself is a joke, but only if you have an appropriate plan to deal magic damage without BURNDAYRAZ. I think maybe a Half-Dragon would do well here, it's the next thing I was considering.
@Srid - i actually didn't consider WEYTWUT. I think I would have had a much easier time if I did - a Jehora -> GG Priest or Sorcerer could beat this, I think. I don't think Life Steal is worth it, because without DR or resistances it's not really that helpful. The -10 damage doesn't offset the high damage bosses enough, and you can't really regen fight a boss with curses and Frostbite.
WEYTWUT actually is a decent counter to Prototype 1, as well. When I thought about using it before, I thought that since Lusory is Chaotic, slowing him doesn't matter... but you want to use it on the golems, not him. On the other hand, if you get unlucky with Chaotic he might put you somewhere you can't get out of.
Also, technically the Orb of Lusory IS lockerable... just the 10% magic resist one that spawns an illusion when consumed...