Apoph: Being called a daemon perhaps? I recall the Author saying that calling a daemon a daemon, as opposed to demon, is very insulting. And it is, being one myself.

Nightmare: I recall that when Sivelos screwed up by calling him just Overlord. His title was Tyrant Overlord, but it seemed to be insulting just to call him Overlord.

Hey, hey, hey! This is all assuming we're strong enough to even lay a finger on Baal, right? Last I checked, Baal didn't even take a positive amount of damage from one of Ecrivain's attacks, as well as launching him out of the current dimension with just a swipe of his great sword. Are you sure you've thought this through?

Apoph: *shrugs* It's the best I can think of.