I hit level 79 this morning, thanks to 2 days of vacation and the weekend, levelling as prot from my 70 spec in T5+ gear. (With respect to "prot levelling spec" -- I used
the James guide for Howling Fjord, then Dragonblight, then Borean Tundra (after the crowd had cleared). Once that was done, I just headed into Grizzly Hills around level 76, cleared a couple levels and got the quest achievement, and then headed to Storm Peaks.
As you alluded to, questing is probably faster levelling than instances, though you can usually get a spot in a group as tank spec. When you hit level 71, get Divine Plea, use it whenever you can. Ditto at 75 for Shield of the Righteous. It hits like a monster. You can pretty much skip the other trainings from what I've seen.
I started out in "semi-tank gear" -- I had the S4 ret gloves and S3 ret helm, plus a
Chestguard of the Warlord gemmed for +strength, and expertise capped in my tanking gear. It's really not too painful with JoW/Divine Plea. I could also solo many of the "(Group 3)" quests in Howling Fjord, taking on +1 level elites without needing to blow any cooldowns except maybe a potion. Shield of Righteousness is great for single-target dps -- probably about 330dps (1.5k hit, 3k crit) in my current gear without a lot of particular attention to block value. I did put 3 points into shield of the templar for
Right now, it seems to me that BC Potency, Agility (0.5% dodge and crit), and Accuracy are probably good weapon enchants. Since I'm a blacksmith, I'm also looking at
Titanium Weapon Chain for the disarm reduction -- with our new focus on instant melee attacks, losing your weapon/shield hurts almost as much as it would for a warrior.
I haven't noticed "Ghost" hit from previously having Precision before it was removed from the tree; I had it before 3.0.2, but I might have re-specced once between then and Wrath, plus I'm a single data point.
Our new tanking rotation is
really tight -- I feel like I spend too much time watching the GCD. Does anyone have any suggestions for an addon which will let me track the GCD without having to look at my keyboard? I'm also getting the hang of weaving in e.g. Divine Plea and possibly Cleanse into my rotation, usually replacing Consecration.