Black Mage

[Kabooa]

I'm having a hard time lining up my rotation with most mechanics, it feels like they were either designed with complete disregard to Blm or just meant to interrupt every rotation.

With sparing use of your instant procs, Alte Roite allows for a nearly constant amount of uptime with your primary spells. There are a few spots, but not many, and the shorter the fight lasts, the better.

Halicarnassus is practically made for Black mages in the first half, though the second half would require your team catering to you in order to maintain the high uptime. (Trusting someone for A-Manips, taking over someone's book spot, Bard doing the LB instead so you can scumbag on the ninja and giants, etc)

I don't have enough Neo/Exdeath experience to comment there. Only that it feels more than manageable once the mechanics are learned.