Omg, a lot of shit in here.
So, the first question is: What do you want to reach?
Just gold? Stick on your raidgear. You dont even need to change the meta. Gold is just so simple.
Serverbests/Sellruns/Worldrankings? Go for Crit/Parry, get almost all of your socket bonuses.
The reason is, crit is your highest dps gain with high vengeance. If you do CMs really fast, youll be never ooc, youll be always at 80-200k vengeance. Second reason for lesser survivability is:
You always need a CD. Your own or an external.
Exception, when you dont need (acutally must not use a cd to have it in active tanking phasis) is kiting, stuns.