Recently I acquired an old but serviceable copy of Ghost Tower of Inverness.
Originally designed as a tournament module, it has some slightly different procedures for play. One of these procedures is that monsters always do mean damage (rounded up). A monster that normally does 1d6 damage with a particular attack will always do 4 points, 1d8 always does 5 points, etc.
I was wondering to myself... would that be such a bad adaptation for normal campaign play?
Hmm. Something to think about.