I personally have moved from Promethean PvP to level 50 PvP, for a couple reasons.
1. With Jade Gear and Guardian Spirit, the Ultra Tanks are very difficult to take down. 2. Storm with 500 critical is out of control. 3. Glendemming's PvP gear is fantastic and it's for level 50 and above. 4. Games are much shorter at lower levels.