Hands down i'd easily say Neo Ex-Death. That asshole is pissing my off so bad. I mean VII through X bosses were easy and one was also. But DAMN...His first form is a joke and BAM!! They hit you with an enemy with four times as much as the highest HP boss you fought through the entire game and give him some annoying moves. I CAN'T BEAT HIM. Guess i might be moving onto VI for now without beating V. Tears me up inside, i hate leaving a FF unbeaten. DAMN!!