Zero Nexus
Stand up, go for it
Damn you, fake Balzak from DQIV...
I assume you're on about the first time you fight him, with just Meena, Maya and Oojam? Yeah, he was pretty hard, but if you just kept using the Sphere of Silence and using all your best spells, he went down pretty quickly.
Since i feel like it, here's another boss i hated;
The Doppleganger from Castlevania: Symphony of the Night.
OH MY LORD. This guy had me tearing my hair out, and that's not far from the truth. This guy is BLOODY SOLID. Sure, the dude in the video makes it look easy, but he's an expert and SotN was the first CV i played. The Doppleganger has ALL of Alucard's moves, plus the kickarse sword that Death stole from you at the beginning of the game. This guy makes Captain Dolce look like the Golem Overlord from Chrono Trigger...