So we know SCH is coming, and I'm super excited for that. I know nothing is confirmed about what class they come from, what they will do, etc. etc, so we might already have a second healer in that job... But if not, I'd love to see Musketeer lead to Chemist a la FFTactics.

30 - Throw Item
I imagine CHM to be able to use normal potions and such, but I'd also imagine more of a consumable job specific item kinda like ninja tools. With this ability, CHM would be able to use your already existing items as well as those CHM specific ones on his/her group.

35 - Dispensary
The next item thrown would not be consumed. Would allow for CHM to use some of the more expensive elixers and stat potions without taking up too much money

40 - Mix
Combine items for special effect. This would be pretty vague and not sure how many combinations would be feasible, but something to think about.

45 - Group Therapy
Next item CHM uses on himself will affect nearby party members as well. Another ability to allow for buffing or maybe an AOE cure

50 - Pharmacology
CHM 15 minute last 30 seconds - items not consumed upon use and all items have double effect

I think we can all agree that having another healer would be nice. And this one would heal differently from WHM since it won't be relying on MP restrictions but will have some cost associated with it for consumables. Just some ideas!