Aah, named after the great tank on Magtheridon. You're not Swedish though... nevermind.
First off, your build could use some tweaking. You don't need Iron Will or Anger Management. Points much better spent in Cruelty or even Imp. HS. Prot tree looks fine. You don't need 5/5 in Anticipation though, since you only ever
need 490 defense skill (more after that is just a bonus, stam is regularly better). Consider pulling points out of that and Imp. Shield Wall and put into Imp. Defensive Stance, or even Tactical Mastery for those pulls you're allowed to charge at.
Basically, something like
this. Though, as I said, TM is optional.
You've got 19.25% dodge, 17.83% parry and 18.5% block. You've also got 11.6% chance to be missed. Together, that's 67.18% and is more than enough for uncrushability when Shield Block is up. However, you've got a long way to passive uncrushability (so do all people, which is why they rarely go for just that).
Let's look at the 'real' Kungen's stats.
Dodge: 25.27%
Parry: 21.75%
Block: 32.74%
Miss: 12.52%
All together: 92.28%. So, he only needs 7.72% more Avoidance to hit passive uncrushability.
Now you're thinking 'Oh, but if the best geared tank in the world isn't uncrushable, how can I be?'. Well, just take a look at his gemming. Almost exclusively +stam. You can pretty easily get uncrushable, question is; is it really worth it?
Basically all it does for you is let you eliminate Shield Block from your tanking rotation. In addition to somewhat lower your damage taken in those rare occasions when SB isn't enough to hold off the crushings.
Only advise I can give you on avoiding crushings is learn to keep SB up as much as possible. In some cases the charges just aren't enough, but in all other cases, just keep it up.