I do like this idea and have been wanting a sort of healer class for some time. When I first heard about the Sunsinger I thought that would be a healer class but it wasn't haha. Having a healer would be a brilliant edition for just about anything (raids, nightfall etc) I'd love to see this form of class implemented. Maybe its three subclasses each buff in a different area, it could have one that regens health, one that buffs defence and maybe a revival one too, whilst all of its abilities can be about buffing you and your team mates? Maybe a few life steal grenades perhaps :)