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I like going to the outlands and gear up with quest items. At 61/62 I like to go back and run Scholo and Strath each once getting all the quests done (With the chance of getting the mount). When I am done with that I return to the outlands and usually hae enough stuff to do till 70 without the need to grind.
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If you have RAF, you're going to get roughly 600xp per kill in Outlands, just from regular mobs.
If you're on a PvE server the answer is easily to go out there at 58 and start picking up gear immediately. Those two levels are fast without RAF.
If you're on a PvP server, you might not want to grind as it's a little more combative out there, with 70's flying around. Questing should still be good. You can pick up 4-5 items in the first hour of questing out there.
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You'll get six times the EP in outland with RaF and Ding 60 in no time. On the other hand: IIRC there have been a lot of nice kill quest in Silithus, so I might not matter that much.