Chemist
30 Alchemist / 15 Conjurer.
Weapon:
MH: Vial OH: Backpack with a baby Kobold sticking out the top with a vile in each hand.

Chemist will be proficent in heal-over-time, HoT that also has an initial heal (Think of Circle of Scorn, but a heal that is not a PBAoE), and a few modest single target heals.

The Chemist will be unique because depending on the heal spell a special buff will be placed on that party member(s) such as, but not limited to HoT + dmg buff, HoT + Dmg reduction, HoT+Initial Heal+dodge/parry/block buff, AoE HoT + get more limit break bar refill per auto attack etc.