2 options come to mind:
1.: Move the hunter in such a way that your mage faces while still autofollowing; that's how most of us do it
2.: For the love of god why isn't your Hunter's pet tanking? Send pet it with Growl on autocast, turn on 1 attack skill for extra aggro(Bite/Claw/Gore/Ravage/etc) then start player/char dps, hunter may have to FD if you open with Aimed Shot like I did while lvling but otherwise the pet should tank it and tank it at max range; if you're pre-10, get 10 ;p If you're pre-30 and thus can't FD, use Disengage, back off , then step back between mage/monster while pet still tanks, should keep him facing the right way