I tore necron apart and i screwed up going into the battle, no one had any status effect protection, and only one person survived grand cross. Stiner. I was leveling up and learning all the abilities and decided hmmm let's fight the boss. I use shock on him after he killed Shadow (Zidane), Garnet, and ViVi. He is a wus but Ozam I can't beat. I have all the legendary weapons, all the abilities, and guard aginst all the status affects, the only way to really counter curse is to use mini or have zidane holding the tower and use soul blade on the other party members.

All that to say Ozam would make a pimp final boss, but make it more like this:
Ozma is the living crystal woken by Kuja and now wants to return everthing back to ZeroWorld because of the curruption into mens heart. And if he looked more like the crystal instead of a superball. And Necron be the failed summon that after defeating him in the air garden Ekio got to summon him and use grand Cross and Dagger would have ark, and all would be right with the world. That would be a thugish final battle. Dagger using ARK--Eiko using Necron--- ViVi using Doomsday--- Stiner using Shock or Doomsday Sword----and Ozma Unleashing his fury that is how the game should have gone.

I do think they should have been switched.