Seija wrote:But the main problem...
Threat shouldn't matter at all if you have a rogue/hunter in the raid, just ask for Tricks( http://www.wowhead.com/spell=57934 ) and Misdirections( http://www.wowhead.com/spell=34477 ). As a tank you should be only concerned about your survivability, I like to have 158 hit rating so all of my taunts hit(6% from gear, 8% glyph, 3% spriest/boom = 17%) other than that expertise/hit rating doesn't matter at all.
Just make sure you are keeping lacerate @ 5 and Mauling all your autoattacks, then Mangle, Swipe, FFF as you like.