Ok, figured out after missing one of the messages on the first floor. Finished the 4th dungeon as well, completing the game. A little feedback on class balance:
Not sure the difference in the end between a warrior and a paladin, other than that the paladin can equip some of the near end-game gear that the warrior cannot. Thieves miss out on a lot of gear, and thus can't hit as hard in combat. With how cheap it is to unlock chests with a conjurer, they seem unneeded.
Monks would be awesome, but something is off with their exp scaling. I put one in the party, and while my paladin and warrior would get multiple levels above 20 in a trip, he would only get 1, or none. Needed way more exp per level even under 20 than the other classes above 50. With how low the HP is, due to the low level compared to the other classes, running into enemies with AOE spells makes them kind of a no-go.
I don't quite understand the point of the mentalist. You can attack any group from the first 3 positions, and spells hit all enemies, or just any one group of your choice. So, the position of the enemies doesn't make a difference.
Spell casters are awesome, and if you could grind enough magic gear to give them good enough AC, I would take 6.
The auto-mapper drastically decreased the difficulty of the game a lot. I like it, and would have really struggled with the last two dungeons without it.
Enjoyed the game a lot. Downloaded for free, but will throw some support when I can.