And shirk is beneficial when? For fight u have tank swaps in and what? You change one gcd with no use of shirk maybe two if you don't know what your doing and that outweighs the potential damage reduction you get which will allow for healers to heal you less and do more and allow you to stay out of tank stance and make you blow less defensive cds?
You just don't understand how the flow of combat works, Do you realize how rare it is to not be crit for 25seconds? If you don't you've never paid attention to the numbers your taking ever you've only cared about the numbers you've dealt and if thats the case you should put down the class and dps. I'm convinced we are ideologically different you want more dps i want more versatility and freedom to stance dance without having to blow other cd's. I've done tank swaping with out shirk and i will continue to do it.
You can pick up that role skill that we have all been doing fine with out including you ill take awareness and do my aoe pulls mostly out of tank stance while you run around trying to find some scrub tank to shirk for.