Pretty meh about this (goth stuff isn't my thing), but it is at least a concept with some design space.

I think it would probably be called "Medium" rather than "Spiritualist", since Spiritualists tend to have different connotations. Or maybe take from other FF jobs and call it "Invoker."

And if it's using candles as a weapon, definitely needs some fire effects. Would help differentiate from the other healers.

Pet jobs are the way of the dodo, just make the ghosties into spells.

Still feels a little bit of a mish-mash of DRK, BLM, and RPR, but I do acknowledge that it wouldn't tread on any healer design space. I especially wouldn't mind a job like this in the game if it meant I could get my light-magic DPS mage.