Well, Kuja once going into Trance was a demi-god and he'd destroy AC Sephiroth. As would the following:

1. Hulk Hogan
2. Albedo
3. Any of the Testaments
4. KOS-MOS
5. Id
6. Kain (LoK)
7. Raziel (LoK)
8. Lavos
9. Ness
10. Emperor Palpatine of the Star Wars Expanded Universe.

And the list goes on and on.....he's really weak all in all for becoming a god.