Fractured in Alterac Valley Cards List & Guide
Depends on how many you are actually facing... On rank 3-5 I face maybe one Quest mage in 20 games, freeze mages a little more.
Only if you face a lot of mages.
Flare most of the times is "2 mana: draw a card" wich is not good enough for hunter, the class needs to be on board and apply pressure to win and spending 2 manas just to draw will lose you tempo.
So IMO just tech it in your deck if you face a lot of mages, as its a great win condiotion in that matchup, but otherwise the card is not good enough.