I am planning on running my own 10 box Naxx team as far as I can take it.

I want each priest to just heal her own focus and use COH and Prayer of Healing to keep the group up when needed. Flash heals are for emergency group healing and each character in the group should have its own flash heal button set up. By the way, you will want at least one macro which heals focustarget since you need to main heal MCed targets on Razuvious.