these are likely known bugs, but here goes:
Antrax, lord of banefires, has 11 attack, +3 for fire bonus, = 11
and Magoth the archdevil has susceptibility to cold: 0% (this is while holding the forbidden light, if that gives 50% cold resist it is undocumented).
As well, other battles have shown that the twin axes a) only ever chop off one arm, and b) losing this arm has no effect on the recipient. I was so hoping for something along the lines of the black knight in Monty Python and the Holy Grail...
ahh, that was the dream ;(
as it is, i switched out the two axes for a sword of swiftness and main gauche. only 3 attacks instead of 4, but +14 defence...
edit: ah solved antrax. took off his fire helmet and then replaced it and his attack is back where it should be. still a bug, but less irritating
double edit: ok, it seems that the forbidden light gives 50% fire resist and 50% cold resist.