I recently finished my current COK playthrough,
started way back.
Although I've 3 mages in my party, none of them has learned Fireball (yet); any wands I've found are still unused (or got sold).
I don't know if I'll keep this up for DKK though - COK has no level draining undead...
While messing around with some player character files, I noticed that dwarves got shafted with regard to their saving throws. Remember the claim from the Adventurer's Journal, that "they are especially resistant to magic and poison"? Well, fake news. Turns out that dwarven saves against paralyzation, poison or death magic are off-by-one on the worse side compared to a human or elven fighter of the same level (tested with newly created 12th level fighters in DQK).
Well, at last now I know why my dwarven fighter got fucked so often by centipedes or ghasts...