Holy Light
Holy Light is our bread and butter spell in Cataclysm. When you have nothing better to cast, cast Holy Light to fish for Daybreak procs.
Holy Shock
Holy Shock heals fairly well in Cataclysm, and has quite good Healing per Mana (HPM), but the primary purpose is to generate Holy Power. Unless somebody is need of a big heal (Flash of Light or Divine Light), Holy Shock should be used on cooldown, so as to not waste Daybreak procs, to maximize Holy Power gains, and to maximize Infusion of Light procs. Infusion of Light procs are incredibly important and should always be used on Divine Light when possible
Divine Light
Divine Light is one of our best heals. It has relatively low Healing per Mana (HPM), but incredibly high Healing per Second (HPS), especially when Infusion of Light procs. You should be using Divine Light whenever you need to heal somebody up quickly ? not super quick because then you?d want to use Flash of Light, but moderately quick. If you didn?t need to heal them up quickly, try to use more Holy Light. It is very standard for top Paladins to have 30%+ of their healing done with Divine Light, and with all of our ways of regenerating mana,
there is no reason to be scared to use a lot of it.
Word of Glory
When you have three Holy Power, you get a choice between spending it on Word of Glory or Light of Dawn. Word of Glory is a powerful, mana-free, instant cast targeted heal.
See "3.1. Holy Power Use" in "3. General Mechanics" below for more details.
Light of Dawn
The other option to spend your Holy Power is Light of Dawn. It is a medium-strength, mana-free, instant cast AoE heal. It is very powerful when people are grouped up.
See "3.1. Holy Power Use" in "3. General Mechanics" below for more details.
Holy Radiance
Holy Radiance is a powerful new healing cooldown in Cataclysm. It lasts for 10 seconds on a 30 second cooldown, so it has a fairly high uptime, and heals everyone within 10 yards (although it diminishes in effect past 8 yards) for a fairly good amount. There are a very large number of situations in Cataclysm where your party or raid have to stack up, so using Holy Radiance every time you?re in range of 3+ people is a good idea. The spell will benefit from your Haste and Critical Strike but not your Mastery shields. Holy Radiance should always be used right after a Divine Favor to give it a few extra ticks (as long as there are players around you, of course).
Flash of Light
Flash of Light is ?a quick, expensive heal?. The problem is that Flash of Light is VERY expensive for the amount that it heals on average. Flash of Light?s Healing per Mana (HPM) is much lower than that of Divine Light. It does have a higher Healing per Second (HPS) than Divine Light (without the proc, otherwise Divine Light is better). It is therefore only usually used in situations where the person is in danger of dying extremely quickly. Chimaeron is a good example of a fight that Flash of Light is commonly used on. It?s also great to snipe other healers on trash pulls and other fights that will end before you run out of mana (I?m kidding, kind of).