Now that Darvin's thrown down the gauntlet, I'll have to put some effort into beating on Namtar. I think I can do a Purist Tinker win, I just need to figure out how to get past form #3...
Form 3 is pretty easy if you've got any spellcasting combo. If you've got BLUDTUPOWA, he's a complete push-over. Real trick is getting past forms 1 and 2 with enough resources to keep momentum. Generally speaking, though, if you can get past form 3 you're in the clear.
As for the rules, this was the original wording in the original thread:
Any DD player can then submit a screenshot showing a successful run.