Why does the game hate Spellcaster so much?

[Naylia]

And about incapapitation i mean incap NM or regular mob: for exemple incaping the horn of an algoat so you have higher chance to get algoat horn +3 while farming to make a hq item

That's exactly what I was responding to. We found that to say incap the head/horns, the mage needs to stand directly in front of the monster, and you could damage that body part. If the mage stood to the side of the monster he could not damage the head/horns.