Mastery seems terrible :'(, i really want it to be good, but currently, without a lot, it just seems so lackluster.
I want to reach the 13% haste level so you get that extra tick for LB, at least that is what i have read elsewhere. Crit will fill in every other spot, ideally
12.60% is when it ticks over. So not quite 13%.
But ya, def worth it.