Job thought....Chemist (Working name)
An idea that I've been juggling with for a while is the idea of a healer that mixes "ingredients" together to produce a result. Essentially it would function like Rikku's FFX "Mix" Overdrive combined with NIN mudra. This ability could then be further augmented via abilities to make the concoction AoE or have additional affects.
As AST is kinda RNG, and the other two can get stale, this may be a decent way to have some depth in the role. Let me know what you think, always interested in hearing opinions, whether positive or critical.
Also on the off chance anyone at SE reads this and wants to use any of it, feel free. I claim no ownership to any of the ideas posted here.
Chemist is literally my #1 pick
Dancer should be a DPS in a similar vaine to bars, but with a larger focus on debuffs, it would make a horrible healer, chemist is the best healer lined up, instead of using items this time, it should use (crafting) as a cast time and toss the items to members at a large range to effect them, or the enemy with botched potions or other harmful items, heck you could even hive them a flintlock as a weapon or a satchel (simmilar to the F only purses but this time for everyone and being used for the "items".