How'd you go about it, Wazzy?
In this case my gear really helped out and I didn't use the better strategy to beat him which is using Carbuncle or Reflect so NORG's magic attacks do nothing. You can also bring a friend summon of Tyro Sentinal so that the physical attacks don't do much either.
Make sure to bring death and a bunch of abilities that can last most of the fight after Reflect or Carbuncle is summoned. I think with reflect you don't have to worry about the orbs changing color(for me, I had two characters keeping the orbs in blue territory and if they were blue I had the two characters heal) and just keep attacking his shell until it breaks. Cast death the moment it breaks on NORG and hope it lands. S/L if it doesn't.
You will need Squall for the fight. I brought Irvine at level 39(I thought I had him at 40 but nope lol) and geared him out which was helpful.
Try out the reflect and death strat and it should hopefully work.