People have been begging for a darker healer. How about a plague doctor?

They could wield a scent device in one hand, filled with incense, and some sort of another weapon in the other hand. Perhaps a single dagger, or a sigil.

Would use herbs, aromatherapy, and focus on cleansing the disease and impurities out of their allies.

For combat, they would be ruthless in their poisons, and concoctions that would be breathed in the very air, and coated onto their tools.

There wouldn’t be potion mixing like chemist. It would be more of a ritualistic healer.