Broken skill books

There's also skills that don't work as intended, like the blademaster's demon masteries and others that should give extra crit% but don't work, or the cleric magic buffs that can't be overwritten. Not sure if those cases are included in the broken ones in this topic?

For the list of skills that can't be learned, I have confirmed those classes/culti:

Demon Blademaster (4 skills):

Heaven's Flame

Glacial Spike

Myriad Sword Stance

Drake's Breath Bash

Sage Cleric (1 Skill):

Tempest