My guild is discussing this, and we can't decide which is better.
I'm 69/150 quests in Vashj'ir at the moment, just hit level 82 (did 3 BRC runs, and 3 bars of archaeology at 81), and I fear I will overlevel in Vashj'ir, leaving me at 85 in the end of uldum, with no reason to do Twilight Highlands (except for gold at a later point).
What has everyone else done?