I was hoping I could get some tips on simplifying the Donjon mechanics even further without doing violence to the spirit of the game.

I've already tried the D2 approach, comparing even results on any sided die. Here are some other thoughts I had:

1. Combine some of the physical attibutes (like virilty and the one that starts with the letter "W") and mental attributes. Leave social alone. Get rid of the saving throws and just test against physical or mental.

2. Combat. Combine hit and damage somehow. Not sure how.

Great game.