Discipline Priest revolves around preventing damage by shielding and reducing damage with Pain Suppression, while still having some good direct healing potential.

Stats for Discipline Priest Wotlk

Stat priority

Spell Power > Haste (430) > Crit > Intellect > Spirit

Discipline Priest Stats Overview

Spell Power

Spell power is the best stat for a discipline priest, spell power will increase the healing output of all spells and Power Word: Shield absorption is increased by 40% of the spell power.

Haste

Haste reduces the global cooldown by a small amount and increases the speed of the casts, after 430 the cast time will be below the Global Cooldown, and there is no more reason to add more, has the Global Cooldown will never go below 1 second.

Critical Strike

Critical Strike increases the chance to heal for double the initial amount.

Intellect

Intellect increases the mana pool and critical strike chance, however, most of this stat will come from the gear itself.

Spirit

Spirit increases mana regenerated, with 50% of this amount being even while casting, spirit is increased by 6% with [Enlightenment].

Stats Breakdown without increasing effects

33 hit rating ≈ 1% to hit

33 expertise rating ≈ 1 expertise

33 haste rating ≈ 1% haste

45 critical chance ≈ 1% critical chance

1 stamina ≈ 10 Health

1 intellect ≈ 15 mana

167 intellect ≈ 1% critical chance

1 agility ≈ 1 attack power

1 strength ≈ 2 attack power

1 critical chance ≈ 84 agility

14 Armor Penetration ≈ 1% Armor ignore