First off, it's worth it to invest some points in PvP talents if you intend to do this. AV gives you the great advantage as a leveling character of being one face in a mob, making it harder for the level 80's to immediately pick you out of the crowd and crush you to death with two swings of their 232 DPS 2h weapons. (That's what Divine Storm, Whirlwind and Heart Strike are for!) It's worth picking up utility talents like Frozen Power and sacrificing DPS (let's be honest, you don't have any) for possible snares and increased damage on people your Frostbrand has slowed.