Playstyle & Rotation
For Resto Druid rotation you have to micromanage a few things, weakauras help with this significantly.
You should aim to keep Lifebloom up at all times, with it on the active tank or a player taking significant single target damage. Efflorescence is an exceptionally mana efficient spell that you should aim to have at close to 100% uptime, usually placed on the melee camp as they are the most stationary.
Next up is using Cenarion Ward properly. This is a strong, mana efficient, single target heal mostly used on CD but occasionally you may have to time it with an incoming mechanic to quickly heal up your raid member. This ability is affected by flourish and gives remarkably powerful single target healing when used correctly.
Clearcasting is a proc you gain from having Lifebloom active, this gives you a mana free Regrowth cast that should be used on any target that requires spot healing. Ensure you are tracking this proc and using it every time. You will receive more value if the regrowth is used on a target without lifebloom if you have the Rampant Growth trait.
Wild Growth is a short cooldown to be used when several party members take damage.
Swiftmend is our spot heal and should be used as necessary.
Innervate should be used as many times as possible during the fight.
Ramping and Cooldown Management
Now that we’ve covered the basics let's head into Ramping and Cooldown Management.
When the raid is about to take incoming damage you must begin your ramp by casting Rejuvenation on several targets. Once you have several Rejuvinations out and the damage is about to hit, precast Wild Growth and then once the cast has finished and the damage has hit use Flourish.
Above is the basic ramp, you’re able to add to it by opening with Innervate to reduce the mana costs completely. Alternatively you could open with Incarnation: Tree of Life to give you a significant healing boost together with a 33% mana reduction on Rejuvenation.
Tranquility is the most powerful cooldown we have and should be used during heavy raid damage and as often as possible. Also combine it with Incarnation: Tree of Life where necessary and possible. An added bonus is that you’re able to Flourish the HoTs from Tranquility.
ABC (Always Be Casting) are words you should try and follow. If there’s little healing to be done you should be casting Solar Wrath while additionally maintaining Moonfire and Sunfire if mana isn’t a constraint.
Photosynthesis is assumed taken within this rotation.
You should be very versatile while playing dungeons as you will often be attempting to DPS while in Feral Affinity to make the key go as fast and smooth as possible.
During low damage you should have Lifebloom sitting on the tank and use Rejuvenation when necessary. All spare globals should be spent within cat form DPSing or applying Moonfire and Sunfire to the mobs.
During medium to high party damage you should place Lifebloom to yourself and apply Rejuvenation and Wild Growth to the party while also casting Regrowth and Swiftmend liberally. If you need further healing use Tranquility and if you’ve taken it, Incarnation: Tree of Life. Apply Sunfire to the pack when you have a free global.
Use your utility spells often. It’s what makes Resto Druid strong in M+.