I do use Tidy Plates, but either I have to spend too much time watching the dots on every mob and the remaining time, or the nameplates keep moving around loosing track of next target. Sometimes even as I am about to target the next add, the nameplate changes position. A fix would be zooming in, but then I will not see the aoe damage (black clouds) to move from it. And spriest aoe (mind sear) is equal to zero, hopefully it will get better in 4.0.6