Would be cool to have Alchemist/Chemist to be a job in FFXIV. I had a re-check on their available abilities in FFTA though and it'd be hard to give them abilities, unless they make new ones which is also an option.

In FFTA they had:
Astra (dispel and buff, maybe)
Poison (which is pretty much bio)
Flare (blm already has)
Meteor (too OP? maybe re-scale it down?)
Death (too OP I suppose)
Toad (this can be doable, a pre-pull CC or something)