Holy Priest
Introduction

Holy priest is one of the most underrated healing classes in Wrath of the Lich King. But actually I believe Holy Priest is just an awesome healing class if played well and it is more fun than other healing classes to play.
Talent
I. Serendipity Spec (caster)
II. Empowered Renew Spec (Renew Spammer)
Glyhps
1. Major Glyphs
- Glyph of Circle of Healing Your Circle of Healing spell heals 1 additional target.
- Glyph of Guardian Spirit If your Guardian Spirit lasts its entire duration without being triggered, the cooldown is reset to 1 min.
- Glyph of Prayer of Healing Your Prayer of Healing spell also heals an additional 20% of its initial heal over 6 sec.
2. Minor Glyphs
- Glyph of Fortitude Reduces the mana cost of your Power Word: Fortitude and Prayer of Fortitude spells by 50%.
- Glyph of Shadow Protection Increases the duration of your Shadow Protection and Prayer of Shadow Protection spells by 10 min.
- Glyph of Shadowfiend Receive 5% of your maximum mana if your Shadowfiend dies from damage.
Enchants
Head - Arcanum of Burning Mysteries +30 spell power +20 crit
Arcanum of Blissful Mending +30 spell power +10 mana/5 seconds
Shoulder - Greater Inscription of the Storm +24 spell power +15 crit
Greater Inscription of the Crag +24 spell power +8 mana/5 seconds
Cloak - Greater Speed +23 haste
Chest - Powerful Stats +10 all stats
Bracers - Superior Spellpower +30 spell power
Gloves - Exceptional Spellpower +28 spell power
Waist - Eternal Belt Buckle +1 belt socket
Legs - Brilliant Spellthread +50 spell power +20 spirit
Boots - Great Spirit +18 spirit
Staff - Greater Spellpower +81 spell power
One-handed - Mighty Spellpower +63 spell power
Gems
Meta: - [Insightful Earthsiege Diamond] +21 Intellect and Chance to restore mana on spellcast
Red: - [Runed Cardinal Ruby] +23 spell power
[Reckless Ametrine] +12 spell power +10 haste
Yellow: - [Reckless Ametrine] +12 spell power +10 haste
[Quick King's Amber] +20 haste rating (in some situations when you really need haste and playing Serendipity Spec)
Blue: - [Purified Dreadstone] +12 spell power +10 spirit
Stat Priorities
Holy priests stat priorities really depends on talent and playstyle and balancing stats.
1. Spell Power (of course both spec needs spell power)
2. Haste (you would need haste over crit for Serendipity Spec) aim for around 800 haste
2. Crit (you would need a bit more of crit than haste when playing Empowered Renew Spec) Aim for around 20% crit
3. Spirit With more intellect your spirit becomes stronger
4. Mana/5 sec Spirit is always better than mp5
5. Intellect (really good stat in some situations it could be better most stats above)
Professions
1. Tailoring: Gives you an average of 98 Spell Power
2. Jewelcrafting: +48 Spell Power
3. Leatherworking/Enchanting/Inscription/Blacksmithing: +46 Spell Power
4. Skinning: +40 Crit Rating
5. Engineering: +340 Haste for 15 seconds on 1 minute cooldown
Best in Slot Gear
Head - [Sanctified Crimson Acolyte Hood]
Neck - [Bone Sentinel's Amulet]
Shoulders - [Sanctified Crimson Acolyte Shoulderpads]
Cloak - [Cloak of Burning Dusk]
Chest - [Sanguine Silk Robes]
Bracers - [Bracers of Fiery Night]
Gloves - [Sanctified Crimson Acolyte Gloves]
Waist - [Lingering Illness]
Legs - [Sanctified Crimson Acolyte Leggings]
Boots - [Plague Scientist's Boots]
Ring1 - [Ring of Phased Regeneration]
[Memory of Malygos]
Ring2 - [Ashen Band of Endless Wisdom]
Trinket1 - [Althor's Abacus]
Trinket2 - [Glowing Twilight Scale]
Trinket3 (optional) - [Solace of the Defeated] (on longer fights you should use Solace of the Defeated instead of Althor's Abacus, and even double Solace can be an option sometimes)
Wand - [Nightmare Ender]
Staff - [Archus, Greatstaff of Antonidas]
Off-Hand - [Sundial of Eternal Dusk]
Main-Hand - [Royal Scepter of Terenas II]
[Val'anyr, Hammer of Ancient Kings]