As you can see, I dug all the way around the map looking for him; no dice. Notably, there were zero crystal patches on the map - if he's supposed to spawn in/with one of those, it's possible that check failed due to this rare borderline-fullscreen vault. I'd argue this is probably just a reason to drop this vault from the selection - it might be fun as a rare one-time map to have pop up 5% of the time or something when a character's between L16-20 instead? "You happen upon the home of a great multitude of rogues and bandits"?
