The resistance lacks can be a downside on playing a Monk, however, and an Amulet of Resistance doesn't cover the more potent non-elemental damages. Your rings are also better off for Slaying, Damage, or some Artifacts, as wearing a Ring of Cold/Fire Resistance is a waste. I haven't personally tried being a Monk myself, and I don't consider myself a good ToME player at all.

I just started about a month ago, however, so I just give myself a mental nudge if I'm heading off to the Sandworm Lair and forgot Scrolls of Trap Detection or something. One of my
biggest mistakes is maxing out on physical prowess, however. I mean sure, my guy can kick Durin's Bane's ass without losing a third of his HP, but when it comes to the Poisoned Water quest Wands of Noxious Cloud barely does any damage.
I also have a level 32 Wood-Elf Ranger, my first character to make it past level 1, and he's pretty much a failure also. Minimum Magic-Device skill, but maxing out on Bowmastery and Archery. I'll take a leaf out of Lord Dimwit's Advanced Strategy Guide one of these days...