I was able to boost with my Mage all the way through ZF with out any problems.
I did enough damage in ZF that I didn't get hexed.

But Strat is where the line was drawn, the mobs just killed me regardless of how small the pull was.
My shammies couldn't' heal me fast enough, and I have pretty good gear (all epics, two pices of the new badge loot and s3&s4).

Im straight questing now, with RAF it's working out pretty good.