I posted a similar issue recently. Again playing Ironman on Cataclysm. First post I was level 3 at the entrance to the Manacalon Ruins fighting those 6 or so humans (with no armor). EZPZ. Then the cult priestess does Inflict Wounds for 78 points of damage and the game is instantly over. I have a choice word, but lets keep it clean.
Today I was stupid enough to try it again (ironman, cataclysm). I got to level 5, doing the 2nd quest in the Tirmarian Tower. I get hit with Chill Touch for 36 then 34 damage. HOW IS THIS POSSIBLE? It does 1d8 and 1 die over level 5, 11, 17. Cataclysm is %150 damage for enemies. So are these skeletal sorcerers level 11+? On the quest board it says "Recommended for Level 4." I was level 5.
Im just venting, again.