If you are any good at 1v1 Pvp, at low and mid levels you will face privates much higher level than you, with much lower rank. And if you win, even if it takes you an hour, you get exactly zero points for your efforts.
How about setting the match up parameters to not allow an arena match that is going to be worth zero points? Can't you make a win worth at least 1 point?
Maybe you could even not allow match ups between wizards who are more than 400-500 points apart.