Glitched Players

Hi, does anyone know anything about glitched players? I was in a dueling game and this lvl 75 amazon was killing everyone. I was in there for an hour, the whole time she was out of town and she never got hit more than 3 times. Another thing is if u got hit once then you died. She was also killing people when she was in town. I was using clegs on her and once in a blue moon when I hit her the clegs didnt affect her. People were saying that she was "Glitched". I was wondering if anyone knows of this and how to do it.