It is something I have been considering but I was wondering if it caused any issues since the AP's don't assume you are using that optional rule.
Has any one tried it?
How did it go?
Yes. At least we used an Armor as DR rule where Armor and Natural Armor bonuses counted as DR. Dodge, Shield, Dex, and Deflection bonuses counted as normal.
Ugh it was a nightmare. Every attack made by anyone would hit no matter what because of the costs of items. It became a race to see who could do the most damage. Unfortunately in RotRL you will always be fighting things that do so much more damage than you can.
The only reason we survived is we used the BESM rules where we could buy special abilities. Otherwise we'd have been greasy smears on the boots of every enemy from book 3 on.
I only died... 4 times? In one dungeon?
Never using those rules again.