Tought to release my build for everyone, since so many been asking it and so small amount if birds on low level pvp. Here's my build.
15 assassins sniper helm
15 winter festival snowball launcher
15 expert leather
Damage ring (1crit, 9dmg)
You might also wanna try change one from blast to root if you want to, pretty far best results I got with this build.
And for those who think deX bears bully me down in pvp, it's not that for real.