A year ago I did a pvp challenge playthrough of ng+ on a low level build after playing through ng with it.
Cat ring on at all times and try to beat the game while being forced to go and clense the forest.
Mostly I fought low level gankers around sl60. For obviously higher level players I'd use a hornet/powerwithin/chaos rapier and do my best.
Fun challenge build and honestly some of the most enjoyable pvp I've had in this game.