I just brain stormed something but i am sure there are 100 reasons why it is bad but here it it goes... Give spriest's the inverse of swiftmend. a spell with a fair CD (30 to 60 sec maybe alter with glyph) and make it eat all your dots on a target and do the damage at once. So it would take the remaining seconds of SW:P DP and VT and make the hit at once and fall off. Ok, tell me how this is bad and where it could be tweaked or what would be a fair trade off.