Shamans -Deep Healing: increases the potency of direct healing spells by xx%, based on current health level.
Paladins -Illuminated Healing: direct heals place a shield on target for xx% of the healed amount for 8 seconds.
Priest/Holy -Echo Of Light: Direct healing spells heal for an additional xx% over 6 seconds.
Priest/Discipline -Shield Discipline: Increases the potency of bubbles by xx%.
Now my question is. Depending on your class will you stack a ton of mastery, or would you rather get into other things more like Haste or Crit?
I think I will most likely carry 2 sets of gear with me from now on, because: To heal in a Raid Setting I would want to have enough haste to produce a 2.00 second Heal or faster. Hold on to a Fair Critical Rating so not all of my heals are gimp. I think I would hang on to a "nothing but" mastery set for Dungeons and Heroics. Echo of Light I think would be Pretty powerful when used proper like.
But what's your opinion on your particular Mastery? Spam it or Jam it?