While questing in Gorgrond i eventually came across the quest - Chains of Iron - Chains of Iron - Quest - World of Warcraft
I noticed that the are are 3 mobs (dominated Gronnlings) in the phased part of this quest that award 8-10k xp per kill. I abandoned the quest after killing these and ran back to Rexar to take the quest again.
Most of the time the entire phase had reset and i was able to kill those 3 mobs again (equip potion of accelerated learning for more xp), othertimes i would have to finish the quest and take Nisha to where you are suppose to hand it in before abandoning it again and retaking it.
I went from level 93-94 in no time and am currently halfway through 94.
First time poster here so be easy on me