OK so re: the Challenger challenge: it turns out that you specifically coded a death scene in which the Goddess of Time says "I can't believe you tried a 4-star dungeon when you were only level 1"... touché.
I thought I was being really clever to save-scum until I got a key door and a level 60 giant metal slime, but then, despite putting a bunch of points into Intelligence, my Light Spear spell did 2 damage...