With all due respect, any prot build that doesn't have BOTH Judgements of the Just and Vindication is an awful prot build.
I repeat, an AWFUL build.
Judgements of the Just works on bosses and is the most powerful boss debuff available to a tank.
Vindication also works on bosses and is incredibly powerful. I'd never expect a dps to spec into it or assume that I have another tank putting an improved demo shout on the boss.
You sacrificed Vindication for 2 percent crit. Seriously. Two percent crit...