the build looks pretty solid other than, i am personally not a big fan of shield wall spec and glyph for that fight. for a few reasons, i glyph taunt mainly because i have almost zero hit rating in that set and also i pick up adds myself instead of MD/tricks on all of them. Some guild have rogues go out and tricks the near 2 or far 2 or w/e, and i quickly learned that healers would get quickly gibbed from my taunt missing or w/e eventually we placed them properly based on permafrost positiong to help avoid that but taunt glyph will save lives. and the 3 ap also makes a difference, very minimal but yet still 3 ap that you can have reduced.
few more things..
DO NOT REAPPLY COMMANDING SHOUT so that it will go into phase 3 with it on everyone. i don't spec booming voice for that VERY reason, it fucks up the timmers on when i refresh it. I put it up in the beginning of the fight, then RIGHT when he comes up after the burrow when we all stack up, then it will fade off just as we transition him to 30%. If commanding shout is up on the 30% turn that is A LOT of extra healing that is done to him initally that can easily be avoided. The less time you spend in phase 3 the greater chance you have to succeed imo. Its just like yogg zero, the fight begins at phase 3 the rest is boring and normal, very repetive.
however also keep in mind with the glyphing and specing has a lot to do on your strat on it. we dont have 2 rogues run out to tricks them because we like to maximize our dps to the absolute highest (brut force our way through it). Focused rage is almost pointless for your role in that encounter. When you tank adds you have an UNLIMITED amount of rage, literally lol.
and glad to help out =D i'm bored 90% of the time anyways i just read these forums lol