Boosting in Underbog is hardly suggested, allthough i loved it.

If you want to boost 60-65 do it in underbog and clear till the second boss(the dragonthing on a plateau above water)

Place slaves here:


That's when you enter the instance, the small group of mobs you'd normally skip to the most left/north, If you put the slaves on the edge of it, they'll recieve experience even when you kill Ghaz'an.

Goes a lot faster then questing for me.