In all truthfulness I don't really use BoSanc in 25 mans outside of Tidewalker's murlocs. Well, I use it if there's 3 or more Paladins and I can get Kings from one of them.
I think the stat desire also depends on where you are progression wise as well. Block Rating is the easiest way to get to uncrushable, once you're there and have better gear coming in, I think it's generally accepting that as a raid boss tank that dodge/parry are more desirable.
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