That 50 to 60 stretch is really quick, a few knock out quests in Ungoro non gather quests (though the Tauren's quests I would do), Felwood, Winterspring, then the core WPL then EPL and you should be ~60 I would think. Those cauldron quests I recall were just insane XP with RAF. The scholo key lead up, lich and what not. maybe Deathclasp if you over there.