The Maven
The young elf looks over his companions after the battle. The ranger can barely prop himself up on his staff¸ the sparkle is gone from the wizard's eye as she sits listlessly among the carnage¸ the cleric has spent everything she has to keep them alive this far. They will certainly rest before they move on from this place¸ but they have miles yet to cover before dark¸ and trying to weather the night here in the open would be signing their own death warrants. Yet there is no telling what awaits around the next bend in the path... or the one after that. The elf unslings his healer's kit¸ carefully unfolding the bandages¸ herbs¸ salves¸ and unguents he finds inside and sets about tending his companions' wound. He cannot help the depletion of their magic¸ but he can restore them physically for their next encounter.
The Maven is the sage that every adventuring party needs. Having searched far and wide¸ and taken teachers where they may be found¸ the Maven could be a dabbler in all the mystic arts¸ a (mostly) mundane physician¸ or a skilled tactician who knows when diplomacy is called for and when a direct assault is the order of the day.
Mainly the Maven helps her friends and counfounds her enemies through her skills and knowledge. It's an approach that no one sees coming.