I actually wrote this like 6 months ago on the wow forums just to get downvoted by idiots and have like 2 not even 1550 rated rogues with visions of sargeras attempt to flame me with something like using other peoples premade groups is a stupid idea, hurr I gank anyway, anyways it was hard to decipher what they were trying to say.
Basically as we know on pvp servers you get frequently attacked by ppl 70 or 90lvls higher than you, they find it fun, yadayada. At around levels 63+ dungeons start giving less and less XP so you are kind of still ''forced '' to quest in between queues , especially there are 2-3 kill X and return with head quests in every zone. So that's like extra 100k XP.
All you do is join some pve realm premade group and quest away never to get ganked by some inbred that simply happened to be 80 lvls higher than u and wants to exercise his power. so basically there should be no more excuses about ''halp being ganked by someone 90 levels higher than me and no guildies and so called 50 ''friends on my ID want to help''.
I, for example on a DPS class and being unable to find any BRD powerleveling runs kept doing Blasted Lands rares for those blue Draenethyst Crystals where you have a chance to receive Chan's robe. It was actually faster than sitting in 40 minute DPS queues.