PvP at low levels with minimal gear is painful. Im top tier now, but tbh I skipped pvp at low levels until I had a fighting chance. Ill be posting a top gear to look out for thread, but pretty much these are the top items to look out for to be successful;
#1 Cleric Regenerate neckpiece
#2 Bard Dominate Lute
#3 Cleric Death Ward Thighbone (Weapon)
#4 Warlock AOE Immobilize
#5 Wizard AOE Disarm
Tommus is also great to gear out, get his taunt+regenrate and counter attack gear. Wizard Disintegrate spell, Rogue Kill helmet, Ranger bows, and the neckpiece for Paladin once u have access to her.
These have the largest impact on the pvp arena.Pretty much every 48 hrs, challenge dungeons change rewards, so scan through those every two days, and if any of these items appear, farm them as much as u can till max level.