I decided to build a party of four paladins. Swords only, knights don't use bows, that's what archers are for. And crossbows are condemned by them.
In the room behind the floating library I managed to kill every enemy except the albino. He ist flying all the time using his ranged attack, not even thinking about coming near my swords.
I managed once to send him into a magic sleep with a scroll (Out-of-character move of despair), but before I was getting near to him, he was awake and flying again.
There is no room with a low ceiling to lure him into and the doors are closed.
Any ideas how to defeat him?