Personally, i'd see him as the welcome witch... err, wizard. Idly flipping through a magazine, as a line of bewitched and overstrung wizards and witches queue up to get info. Him, giving them a glare of monumental proportions, just waiting to AK anyone that bugs him the wrong way. There would be no overworked Mediwitches in there either.... he could empty the waiting room in a snap!
But if he had to be a Healer... he could work on the Spell damage ward. Who would better know the effects of badly or
overused spells? Dark spell corrections could be his strong suit. He'd have a certain flair for it, I'm quite sure.