If you are serious about leveling, you should have gotten the DMF carousel buff on 8/13 and then logged out of the character till Legion On Beta I earn around 1.5m before it wears off, meaning it provided around 135k extra.
Quite unfortunately I fucked up the stables though, the last 4-5 beast quests in Nagrand don't give large amounts of xp, I guess because they are flagged for lvl 100 and got hit by the xp nerf. I was trying to get 2 sets of quests at a good spot in Nagrand by the ogre teleporter. You can turn-in 6x 18,850xp stable quests, log out, log in, and get 6 new stables quests that are worth completing if you have a fast way to their location.