The supers are designed in a way that pretty much any one super has a counter to another. A golden gun will kill a blade dancer one shot. A fist of havoc will as well, so will a nova bomb. A Titan in the ward of dawn with decent skill will also defeat a blade dancer in most cases especially if he has a team mate with him. A sunsinger may get killed by the blade dancer but they could resurrect and kill the hunter once the arc blade ends. An arc blade will kill a single opponent one on one pretty much any time if they don't have their super ready, just like most supers do. Many times an arc blade will inly get one kill because team mates are spread out, sometimes if they ARE all close together the blade dancer WILL get a multikill, also not very different from strikers or void walkers. 3 kills with an arc blade is normal for someone experienced with it and with the right perks. It's hardly better than any other super. My sunsinger friend can get 3-4 grenade/melee kills with his radiance active. My Titan character will get 3 or more kills on people foolish enough to come in the ward of dawn. Blade dancer isn't OP, at least in my opinion.