Wont able to reach top 10 on us with a dedicated Shadow priest unless he does some serious dodging of the countless bis geared 29s qing. Like anytime of the day you can find a few of those teams. Partly because win = + 2 points lose = - 40 or 60.shadow is very nice in BGs but cannot really compare in arenas to stuff like BM, ret, feral, warr with a heal.
im sure you can reach the top 10 though anyway with a smooth healer. the competition isnt all that.