I have a level 100 crusader and I haven't had any KS problems. Also I play in Scania, the most populated world.
There's your problem right there. Everybody trains there. If you want some peace and quiet, GS2 is a good spot when it's not 2x, Ulu city is a good place to hide, and there are many other places with ~lv95 stuff, you just have to look.