Quote Originally Posted by cloud21zidane16 View Post
Considering that Sephiroth actually has MORE HP at Level 99, one-hit killing is out of the question.

As for the amount of time it would take, I would recommend using Yuffie with her Conformer (and if you're not then for the love of cheese do so!). The hardest stat to max will be Luck since it's monster is one of the hardest to beat, and Luck is one of the lowest stats (next to Dexterity). If you were determined to max out each character, then I imagine you may end up playing for the better part of 200+ hours.
well are you still up for that? i mean think about it is it really worth it
That's wrong, because the enemies that can be morphed into luck sources are common and come in groups of 2 or more. With Morph-All, it's probably the easiest or second easiest stat to max (competing with Speed). Spirit is the hardest, really, because only Serpents can be morphed into them, and they're rather rare, and take longer to kill than those that morph into Luck sources (those can be oneshot).