Don't get me wrong, the nightstalker super sucks in PvP unless you work in a group as a team. If you go it alone make sure to get the quiver perk as it gets you 3 arrow shots instead of one. It also seems to take forever to charge compared to gunslinger so I use it as a last resort to take out a group or as a panic button to disorient someone and shut off their super I get most of my other kills from the 2 different kinds of grenades and tracking abilities I have and I speck my character so that those charge faster with high strength and discipline.