This is a up-to-date Holy Priest Rotation for patch 5.4. If you have any questions or suggestions on the rotation, please let me know.
Note: This is just your basic rotation. For more advanced
Click Here For An Addon with Pre-Made 5.4 Rotations
Low damage to Target
Keep Renew up on target, then start casting your regular Heal if they need it.
Moderate Damage to Target
Keep Renew up on target, then cast a Prayer of Mending. If they need topped off, use your regular Heal.
High Damage to Target
Keep Renew up on target, then cast a Power Word: Shield. If there are Discipline Priest in the party, let them use their shields instead. After that cast a Prayer of Mending followed up with some Greater Heals.
Start spamming your Flash Heals. If you’re also taking damage, use your Blinding Heal. If things start getting really rough, use your Guardian Spirit. This is the only time you should be using Flash Heal and Blinding Heal. They’re not very mana efficient.
Low/Moderate Damage to Target
Cast Circle of Healing off cooldown, then cast Prayer of Mending and keep it up. Lastly cast a Holy Word: Sanctuary wherever is most beneficial.
High Damage to Targets
Place a Holy Word: Sanctuary on the ground. Use Circle of Healing off cooldown, then cast a Prayer of Mending and keep it up. Lastly start spamming Prayer of Healing.
If you’re still having trouble figuring out your Rotation, or need a more advanced one, then check out the addon I use called Edge. It will show you how to set-up your talents, what glyphs to use, and detailed rotations for leveling, pvp, and raiding.