The suppression room
Depending on how good your raid is, the suppression room can be smooth or a living hell. In both cases, you’ll have only a few occasions of being out of combat and having a little time to drink or ress up people. Do not miss those!
As a priest heal, there also are a few things that you’ll have to do right to make this room smoother:
At the end of the suppression room, your raid will have a few seconds of preparation – in a safe spot – before pulling Broodlord. This is when you mana up, buff everyone that needs to and use your consumables. It is a mana intensive fight and using consumables could be needed.
The fight
This is one of the most difficult fights for healers and tanks. Tanks can be 2shooted anytime and the healers have to top them off within a second when they take damages. The other difficulty is the threat, even for healers. So you’ll have to use Fade on CD during this fight.
There will be 3 tanks, and the agro will rotate on each of them. The 3 of them will take a blastewave at the same time, regardless of who the boss is on.
A good strategy for this fight is to assign each priest to a tank. This tank is the one you are responsible for and that you have to top off at each blastewave. Appart from that blastewave, you should be watching the tank that the boss is currently targeting and using proactive heal on him.
There will be a Mortal Strike debuff on each tank rotation. You have to put shield on the tank at this exact moment. Do not shield him before, because you would risk having a weakened soul on tank when he takes mortal strike. During the mortal strike, you should also be using R5 Greater Heal as a proactive heal.
Obviously, the priest with the most heal power have to keep renew up on tanks.
You should be using mana pots and fade on CD. The more mana you have, the better, as you’ll be able to use R5 greater heal as a proactive heal with more liberty.