Desperate Prayer

Desperate Prayer is an instant self-only heal that costs no mana to use, healing the caster for 30% of their total health. It is a talented ability in Tier 2 in the Holy tree. The talent used to be a racial spell available to humans and dwarves only.

Improvements

 * Twin Disciplines increase the healing received from Desperate Prayer (from 30% to 30.18% when fully talented).
 * The spell makes a great combination with Blessed Resilience, which will usually increase the healing by another 1.3x since you almost always cast this shortly after taking a massive amount of damage.
 * Test of Faith also works well in conjunction with Desperate Prayer since the spell is most often used while on critical health levels.
 * Grace stacks will increase healing done by Desperate Prayer.
 * The spell is unaffected by your spellpower, instead using your max HP as the scaling factor.
 * The spell is unaffected by Spiritual Healing as well.

Tips and tactics
Desperate Prayer is considered an optional talent in the Holy tree, but heals for a notable amount, and most importantly for free. The spell acts as a panic button, but usually, a Guardian Spirit or Pain Suppression will take precedence over Desperate Prayer if critically hit. However it should be noted that by using Desperate Prayer (which can only affect the priest himself) abilities such as Guardian Spirit and Pain Suppression with their 3-minute cooldowns are conserved for use upon other players. Whether to take the talent or not is up to personal preference, but the spell has use cases both in PvE and PvP situations.