So did mythic last night, and other than a few bugs here and there it's actually pretty interesting... Here is a few hints that I thought I would share with you guys;
A)as a tank your damage is pretty much gone, so you don't have to gem as much for damage. Also, you may want to up your mitigation/surv because things still hit hard and excess crit won't do much for you. Haste/Mastery seem to be the way to go for my bear and haste mastery was always the second way to go for brm monks. Avvar/Pink, Surviving is a lot harder now. Things hit harder, AM works differently... Keep that in mind.
B)Immerseus was a bit harder for us because when we did the 25 man strategy we honestly didn't have the heals anymore. If you use the 10 man strat (Don't worry about lining up just worry about not standing in puddles) and have everyone fairly close together it went a lot easier.
C) if you have updated DBM, go download the DBM Mists of Pandaria mod, it's no longer with the core download...the core is for WoD.. I know it's not a must, we figured it out at Sha of Pride, and it greatly assists with that fight.
Halloween