Hello,
I find it very hard to find any information about healing with a monk.
The only things guiding me at the moment are:
This post:
http://www.twinkinfo.com/forums/f99/20-mistweaver-monk-44061/#post588720
And some resto drood gear :
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Freetoplayqt @ Aerie Peak - Community - World of Warcraft
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Beefstock @ Aerie Peak - Community - World of Warcraft
But i admit i'm not sure that's the way to go, any advices?
Stamina and Spirit are both thresholds - meaning they are either useless or your most important stat, depending on the circumstances.
Stamina is the best stat if you think you are going to be taking large amounts of damage. As a monk, you generally can avoid stam stacking in Battlegrounds (Healers in arena should almost always stack stamina) because of rolls / Tiger's Lust.
Spirit is the best stat if you think you are going to be in fights long enough to run out of mana. As I understand it, Monks have amazing single target heals at the cost of a relatively high mana cost - so Spirit naturally fits in as being a very important stat to stack.
The next 3 stats are all based on scaling: Intellect, Haste, and Critical Strike.
As it stands, Intellect is the best stat for any healer - just in terms of raw scaling with spells. However, it's important to note that Surging Mist has zero scaling with Intellect. It's apparently a bug - or maybe it is an oversight on Blizzard's end, because MW's don't get Intellect->Attack Power scaling until level 42. So Intellect, while being very important, isn't as important for MW's as it is for other healers.
Haste has the benefit of reducing cast/channel times (obviously very good for Mistweavers), but also adding ticks and "partial ticks" to Heal over Time effects. The extra ticks and partial ticks are much stronger when the Heal over Time effects are strong - which, as it happens, Mistweavers have the best Heal over Time spells in the bracket. Haste is definitely the go-to secondary stat for Mistweavers. Haste + Int is your friend.
Critical Strike, having been nerfed to 150% damage/healing, is fairly down at the moment. It's just not what it used to be. Even if Crit had stayed at 200%, it wouldn't be the best stat for Mistweavers. Just as Haste scales with strong HoT effects, Critical Strike scales with strong base heals. As it happens, Mistweavers don't have the highest base healing - their only "flash of light" style spell is Surging Mist, which doesn't scale with their Primary Stat. So the only purpose for Critical Strike is as a Healing Per Second (HPS) boost, which it is currently fairly ineffective at accomplishing.