Holy Spec is good spec for leveling if as you can still do both solo questing and play as a dedicated healer in Dungeon runs for better gear . With Holy Shock and the talents to complement it you will still be able to kill NPC and do solo quests grinding on your own without any problem. Holy is still good for single target damage but not so great against multiple targets,.
Main Stats: Spell Power, Intellect, Spirit
Healing Spec: As a dedicated Healing Spec you avoid long queue times while waiting to enter a Dungeon and be an excellent healer for the toughest encounters.
High Survivability: Your increased healing and mana efficiency will increase your survivability
Great for Battleground PVP: If you like to do Battlegrounds as you level up, this is an ideal spec to use as healers are very rare and can easily turn the tide of the battle by healing your allies.
Protection Spec is our #1 choice for Solo & Dungeon leveling. It provides the highest Survivability and also be able to hold and go against greater number of NPC over any other spec.
Main Stats Solo: Strength, Attack Power, Critical Strike, Agility
Main Stats Tanking : Stamina, Defense, Dodge, Parry, Strength
Tanking Spec: You will be able to tank in dungeons to avoid long queue times for better gear and faster leveling.
High Survivability: Protection spec will make you a great tank and take the least amount of damage over any other specs
Low Downtime: With unlimited mana through talents like Judgement of the Wise and taking less damage you won’t have much downtime at all.
High Multiple Target DPS: Killing multiple NPC at the same time as protection spec is easy with by using a Shield for damage reduction Hammer of the Righteous and Hallowed Ground recommended for fast monster grinding.
Retribution Spec offers the highest DPS on single target but also the lowest survivability vs other specs.
Main Stats DPS : Strength, Attack Power, Critical Strike, Agility
High DPS: Retribution can offer the highest DPS for easy kills however the lower survivability can prevent you from killing multiple NPC at the same time.
Great for Solo/Battleground PVP: Also an ideal spec for any solo PVP encounters and also great for Battleground.