RR is very big for things like your dmg while in aftermatch and the critical hit rate it provides will add more to your DoT. if all you are doing is standing around gaining TP through atma regain and running in and drop ws and getting outt then yeah maybe you could not use RR, but when you are in there dding it out and especially when you have a Crit hit WS you are pretty much foolish to not use RR