However I have a major disagreement on the following point:
VI. Raiding as Discipline (changes incoming)
Raid Healing: Disc is actually a viable raid healer now, due to GCD-based PW:S, Holy Nova and targetable PoH. It doesn't have the sheer throughput of Holy, but if you think you're going to be tank healing for part of the fight and raid healing the rest, Disc is the way to go. Use Borrowed Time liberally to haste your PoH casts, keep PoM on cooldown, and toss off lots of shields if you're in a lull. You can very effectively heal Razorscale or XT by just pre-shielding half the raid in-between the AoE or incoming damage bursts.
That was true for Ulduar, but things have changed a bit since Crusader's Coliseum, and totally changed for Icecrown Citadel.
Raid healing is the main assignment of the Disc Priest (mandatory for 25 players raid, and advised for a 10 player raid, depending on the healers composition). Here are the reasons why:
- Holy Pal do the tank healing job more than twice better than us, because of the holy beacon, their mana efficiency, and their HPS on a single target. Every serious raid assigns Holy Pal on tanks.
- Holy Priest and Disc Priest, when compared in a tank healing situation, are somewhat equivalents: depending on the encounter, Holy can be better (better hps on a single target compared to hps+absorbs of a disc priest, on hard-hitting encouters), or Disc can be better (if you want to absorb avoid spike damages, and if you know when they will occur).
- [PoM+Shield]-spamming Disc Priest is VASTLY superior in a pure raid healing situation compared to the Holy Priest in ICC. That is what I've seen from my personal experience, but you can find the evidences of this statement in the Healing Rankings of WorldofLogs: Disc is 20% to 50% superior to Holy in every ICC25HM, exept for two encounters (Sindragosa were Holy does +40%, and BQL were Holy and Disc are equals). The reason is because of the nature of the encounters. From a TC point of view, the Holy's HPS is better if he keeps a Renew rotation, but most of the times the overhealing % is too high compared to the almost 0% not-absorbing of the PW:S. Only in the encounters were the rad dmg is so high that their is no overhealing from Hots, does the Holy do a better performance than Disc.
For LK, Putricide, and Rotface, the superiority of Disc for raid healing is more than striking.
Hope I could help.
EDIT: I've just seen the "changes incoming" ... sorry if I sounded aggressive ...