How about looking at the damaging side of WHM? I would quite like to see Quake, Tornado and Flood personally. I would have them as enemy target AOE that also buff friendlies in the area. so Quake could deal AOE damage and give allies stoneskin, Tornado aoe damage and blink buff (basically makes next three hits miss) and Flood would be AOE damage and Esuna & small aoe heal.

Or something like that