He's saying there's a vast amount of factors that go into your gameplay, latency, team play etc.. that compared to all of that the mechanics of critigation is simple.
And furthermore, as a tank (DT/guard especially) you don't need critigation at least to some nutty degree. My primary power wear for my guard is every piece T3 except the pieces without hate(not that I need hate but its just a good label to remember). I replace the non-hate pieces with khitai LL hate gear. Simple. You're ready for pretty much all content from t1-4 to all the instances.