Sounds about right with how FFXI did it.
Ifrit, Shiva, Titan, Leviathan, Ramuh and Garuda were the easy fights. Fenrir was a whole different Ballpark, Diabolos wasn't as hard but his battlefield can screw you over big time (especially if you're hit with Nightmare and can't move off of the falling tiles), Odin's fight was the usual Odin deal, Alexander fight was easy. Bahamut V.2 was pretty damn challenging.
