Healing Dunegons as a Holy Priest

Jumping back into talking about some healing. Yesterday I was dpsing with a guildie who is new to healing as holy, and as we went through he reminded me that finding the right balance of spells to use is not easy by any means. This is not meant to limit your spell usage only to those I have mentioned. The key to effective healing is always through trial and error. Learn what your spells do and evaluate how you can best use them. This is meant to be a starting point for anyone unsure about what to do.

Chakra, learn it, live it, love it
So to start off, for most dungeons you'll spend a lot of time in Chakra:Serenity. For the excetion of trash and bosses with heavy groupwide damage, your main healing spell will be Heal, and being in Serenity just makes the most sense.

Lightwell is your Friend
Before I jump into spell usage, I want to add that casting Lightwell before every boss fight is important. Even if no one else uses it, if the only healing doe to you is through the Lightwell, it has saved you from casting heals on yourself, which is totally worth it.

PoM
After a few nights of running dungeons I was able to see just how much of my healing is coming from my spells. The winner by far is Prayer of Mending. I use it every chance I get always on the tank, and it is by far my leader in healing done. Always use Prayer of Mending!

Healing slow with Heal
Next up is Heal. I use this whenever my targets have 50% or more health, and only if they have taken enough damage (normally around 7,000) first. I like to try to keep Renew on the tank as much as I can. This isn't too hard as long as I'm in Serenity as the Heals refresh its durration.

Emergency use only
I only use Flash Heal if someone is in danger of dying, or if I have a Surge of Light pop up. It is an expensive heal, and while it grants Serendipity, it's not really needed outside of emergencies. Typically if someone needs a big heal Greater Heal will have enough time to land, so casting Flash of Light outside of Surge of Light to maintain Serendipity isn't needed.

Group Healing at its Finest
If atleast 4 members of the group have taken significant damage, I use Prayer of Healing and Circle of Healing. If I have to use these spells often, I should be in Chakra: Sanctuary so their potency is buffed. The same goes for Holy Word: Sanctuary, I try to only use this when the group is stacked up so that it is healing to its fullest. These three spells can cause the most overheal, so don't waste them if you don't have to.

Renew and PW:S
There are times when Renew is really awesome and great to spam on the group, but there aren't many of these times. I've found it's most use to come on the tank. The same goes for Power Word: Shield. With its steep mana cost I try to only use it to give someone the Body and Soul speed boost.

Wraping up
In general try to reduce your overhealing as much as you can. Ideally you should be able to stay below 10% overhealing. Remeber Prayer of Mending, and don't forget about your Chakra and the Lightwell.

About Surge of Light

I have seen some points that have been brought up about Surge of Light. Currently this talent gives you a 6% (if you spend two points in it) for your Smite and Heal casts to allow you to cast Flash Heal instantly, without mana cost, and without a chance to critical.

Before 4.0.1 this talent gave you the ability to instantly cast a mana and crit free Flash Heal 50% of the time after you get a critical with any of your spells. This allowed for instant Flash Heals to proc very often. Which in turn allowed you to obtain 3 stacks of Serendipity very easily, which also made casting a faster Prayer of Healing (or Greater Heal) easier.

Now the proc chance is very low. And by very low I mean that if I were to cast 100 Heals in a row, Surge of Light would only pop up 6 times. In a night of raiding (in WotLK content) spells like Renew, Prayer of Mending, and Circle of Healing are the major spells that are used. So out of the total amount of heals you cast the chance to pop a Surge of Light is even lower. Making a lot of raiding holy priests (a lot better than me) find this talent to be very useless.

I personnaly specced into Surge of Light. I have been running a lot of heroics, since I stopped raiding, which means I have been using Heal more often, so it is more useful to me than the alternative (Tome of Light: reduces the cooldown of Holy Word spells). Having said that, I definitely think that the proc chance is too low. I like having talents that cause spells to pop up, but I like them because those procs actually happen. With Surge of Light, it rarely pops up. If they want to keep it from being OP, I would either let it take the form of the older version with a 25% instead of 50% chance, or allow it proc off of all spell casts at the same 6% as it is now.

Something to make it cool and useful. Right now it feels like one of those old Darkmoon trinkets, or one of those Vanilla legendaries with a cool put rare proc.