He was easy. However, easiest Square Enix boss? Final Fantasy X's Yu Yevon/Aeon battles. After defeating Jecht's two forms...you couldn't lose. Auto-Life was applied continuously so you can't lose unless you petrify your other teammates and youself.
yeah, i agree. all you had to do w/ Yu Yevon was hit him with Zombie attack then give him a Pheonix DOwn, two hit kill boss.