The key cards here are
Ancestral healing and windfury
You'll want to put windfury on the dragon turn 2, and hopefully ancestral healing the same turn or soon after
For her second attack you'll need either another ancestral healing or the combination of voodoo and darkscale on turn 6 to heal her for 4 so she can hit the boss again.
Your other cards are there simply to remove any taunters or take down a bit of her life incase she gains armor.
It's a race against time, save hex's for the big taunters she may play.