I have finished the game many times and ive never had more than 16 individual spells. he had at least 18. I dont mean lightning 1,2,3 as 3 different spells, i mean individual spells lightning, demi, fire, ice etc etc. And like i said in youtube Safer Sephiroths HP is dictated by you current level. At lvl 99 it would be higher than 80,000, their are other bosses with a higher hp im sure of it.