Anyone got any recommendations for a good dungeon crawl at about this level? I'm back in the UK and have promised my old group that I'd run a one-shot 24 hour session for them. It turns out we haven't actually run a dungeon crawl yet and they're quite keen to do one.
The characters are 11th level pre-mades under the names of Shooty (Zen Archer Monk), Stabby (dex-Magus), Casty (Sorcerer), Skilly (Fighter4/Ninja7) and Healy (Oracle of Life). The Oracle may end up being a DMNPC.
Fiends and/or Undead preferred!
I've already looked at and input into HeroLab:
Academy of Secrets
The Demon Within
Clash of The Kinslayers
but are there any classics I should consider for players at 11th level?