I play a hunter. I'm garbage at PvP. I've taken out a team of 6 while blade dancing. That being said, in PvE I don't use arc blade because just 1 enemy will kill me. I don't think there's any valid argument which backs up skill being needed to use arc blade... set your perk to heal on kill and use the helmet which reduces arc blade energy use... instant kills in PvP. Just want to reiterate... I often have below 1.0 k/d and have killed the entire 6 person team on my own. Arc blade is easy mode in PvP.