1. Spellpower – the shield benefactor
The most useful throughoutput stat a discipline priest can get. Since you provide a shield blanket for the raid, spellpower is the way to go and don’t let yourself get convinced by some random scrubs that there is something like a sp cap. There is none and primarily aim at as much sp as you can get-the more you have, the bigger the shields.
2. Intellect – the most potent regen stat
This is the best mana replenishment tool out there for an undergeared priest or a one having mana problems. Not only grants you a bigger mana pool and thus increases mana gained from hymn of hope or shadowfiend but also increases crit.
3. Crit – boom
The benefits of this stat are clear as a bell and it’s convenient for any caster to have.
4.Haste – the ‘easy-to-cap’ stat
Some priests consider this a superior stat and of course a fair amount is necessary but let’s not exaggerate the importance of it.
How much haste is enough and why you shouldn’t panic?
The cap for discipline priests is around 11%. Period. It’s obvious that you will have more than that cause most useful ICC gear pieces are crit and haste items and that’s nothing bad. It’s just important to realize that capping haste isn’t all that problematic especially since you have a few enhancers at hand (all in all, as a bis dpriest yes, you will be haste overcapped, no, don’t kill yourself)
Spiritual Guidance is the key here. It’s a T5 talent in the holy tree and provides 5% additional spellpower of your total spirit. Sadly, you won’t be getting this talent as a discipline so the only advantage you get from spirit is the mana regen and we already agreed that intellect is the way to go with regen. Mp5 is even more useless.