A Dwarf Priest discusses Two Tools For Raid Stacking that will help raid leaders take advantage of all the new buffs. I’m probably going to use InTheBuff as I prefer in-game tools.
One of the things I’m not looking forward to in Wrath is re-calibrating all my addons, particularly those for evaluating gear. I know the theorycrafters are going nuts figuring out what the new values are, but I liked knowing the relative values of one point of defense versus one point of parry. Ah well, this way things stay interesting.