[Chaos]

I agree with the consensus that Death Knighting isn't the issue here. Fear is easy to both give and remove, and Death Knighting boasts major weaknesses to compensate for its boosts.

As for Ether Invitation, if its issue lies in being able to one-shot almost everyone, why not make it where EI can only damage someone up until they reach (1~10)% remaining HP?

I.e. If someone w/ 800 HP gets hit with a 1,000 EI, it'll leave them with (8~80, depending on percentage) HP.