I'd like to preface this with the simple fact that I haven't actually done any grinding in outland as prot.... yet. Having just respec'd at 68, I'm planning to gind out the last 2 levels (supplemented with instance runs) to 70.
One thing to keep in mind about prot grinding is we use the AOE concept. Find some melee mobs that hit fairly fast and collect 3-5 of them (depending on how many you can survive). Judge/Seal Wisdom/Light to keep your mana/health up. Use ret aura, have a shield spike, get the
Sporregar rep shield, use blessing of sanc and spam holy shield whenever it's off cooldown. With that many mobs hitting you, reckoning should be proc'ing just about constantly. If you have the mana to spare, a couple of consecrates, but I find that is too much of a mana hog, and prefer to save mana for holy shield and the judge/seals. You don't deal out large numbers of damage in a single strike, but your reflective damage is lethal. By the time you finish the first mob, most of the others in the pack will have been reduced to at minimum 75%, and possibly even to 50%.
When I was aoe grinding pre-outland, it was not uncommon for me to find the last couple mobs in the pack only needed a couple sword hits to kill.
With this method, you should find that you can grind out roughly the same
number of mobs as a ret burst dps build but you do them all at once instead of individually.
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