Armored to the teeth isn't that terrible; it still benefits shockwave, heroic strikes, and Thunderclap.
Just a bit of quick math...
Say you have 16000 armor (at 70), that'll be about 267 AP for you. Sure, it's no str, but it'll still help with your TPS. At 80, I wouldn't be surprised if warriors were hitting 30k+, which will be 500+ AP.
As for your build, it's...well, let's just say it's a bit different than what I'm used to. The lack of concussion blow kinda threw me off a bit and with the new vigilance, it's kinda hard to pass up.
In my opinion, you could sacrifice 1% to crit to grab concussion blow. It's too good of a utility to pass up.
Everything else is solid where it is. If you find other things that are appealling or needed for specific content (such as imp. spell reflect, vigiliance, etc.), take points out of cruelty and put it wherever you like.