I managed to get the hit box strategy to work.
-I got all of my dps hit capped finally with the +hit trinket.
-I used Interact with Target for marrowgar and for Bone Spike. Just to make sure that all dps was facing the correct way.
-I mainly used two buttons the whole fight.
1st button: Tank, 969 macro.........DPS, click macro on boss...............Druid & Shammy healer, castsequence tank heals
2nd button: Tank, 969 macro..........DPS, target bone spike macro..........Druid & Shammy healer, castsequence tank heals............Priest, castsequence aoe heals.
and I have a 3rd button that is basicly the same as the 2nd, but it gets my 4 shammies to cast chain heal.

I cant seem to micromanage the group yet, so i tried not to worry at all about single target heals except on the tank. The 30% buff helped me alot.