I have played all 3 classes in PVP - from my perspective, I always get mowed down in the middle of fists of havoc and nova bomb. However I find it quite hard myself to kill a Titan and a warlock while in their supers. Maybe I just get too close and don't allow enough reaction time. A lot of players like to play on the horizon of your radar, so they can have extended reaction time. I'm more of a "run towards the shiny red light" type of player. What I found with blade dancer is that dodging is incredibly easy. BUT I die incredibly fast when I do actually get hit. Meaning just gotta zigzag and jump to avoid direct hits. This is probably why people think blade dancers are so hard to kill, because it looks like they are absolutely blasting them with a full arsenal. But in reality, the hunter is dodging most of it.