I have to agree with Linux here. Something is fishy with the critical rate of Fists. Just to get a general idea, here’s somethng to think about:
Fully geared and buffed TH has 690 final Critical Rate … Almost every hit is critical on that class.
Fully geared and buffed Tyrant has only 160 final Critical Rate … Don’t know how and why, it might be the whole “it is a C3 thing” … but it should be looked into and (imho) fixed/balanced.
It is not that you do not understand, it is that you do not even question.