for a standard boss i always had trouble with the demons gate on ff vii (although not as much anymore

)
optional bosses that kicked my teeth about then used them to scratch its back are
omega mk v from ffv (i know its not called that but it does sound cool)
ozma ff ix ( took me at least 4-5 years to kill that )
gilgame (that dumbass turtle from ffv that if ya dont have float on at the killing blow ya can say good bye with a 6000 hp+ attack of quake/earthshaker and at that point your lucky if ya got 2000 hp )
Third battle against Seymour (the one on Mount Gagazet) gave me probably the most trouble. Total Annihilation is so cheap.
am i the only person who didnt have trouble with this? Hmmmmmmmm