Quote Originally Posted by Ualaa View Post
I agree with 45-55 in Strat.
Then generally go 55-62 in Ramparts.
Underbog is good after that, if you want to continue in instances.

Boosting is the fastest with 3x experience, so it will be the fastest with 1x experience.
However, I generally quest in Outland, after Ramparts for a bit of gear.
I did 55-60 Ramparts
60-64 Underbog
64-68 Sethek Halls (very pleasant surprise, you only have to move alts once to get the full instance xp)