Yvyvyvyvyvy owning f2p pk.

Im a damn good pker and i have great stats. This guy that i have never seen before was killing everyone and talking mad trash. His name was yvyvyvyvyvy. As soon as i engaged in a fight with him i was fighting to stay alive. He could accumulate 500hp worth of damage fast as shit. He is cb 45 i am cb 46. I checked his stats and mine own his by 7 str lvls and 3 range lvls. Is he hacking or what? How can he do so much damage that fast?