Please be sure you understand game mechanics before attempting to post about them.
Originally Posted by klüger
Um, you do know we are playing Wotlk here and not tbc right?
There is no such thing as Crushing blows from bosses 3lvls above you anymore
Shieldblock for warriors got a huge ass cooldown as well.
As for the first point: The levels-above-you requirement for crushing blows is somewhat misleading. The *real* test was a comparison between your defense skill and the enemy's weapon skill. Enemies at 70 with unusually high weapon skill (the classic example cited being Magtheridon's trash) could crush even though the level difference may not have been three levels. Having said all that, they may have changed the mechanics now to one explicitly based around level difference; I've not seen any recent testing on the issue.
In principle, therefore, a loss in player defense could also open up the potential for crushing blows.
As for the second: I'd presume that's why he listed warriors with shield block up separately from those with shield block on cooldown.