Proving Yourself: Endless Healer (Wave 20)

Travel to the Proving Grounds and begin the Basic Healer (Endless) trial. As of The War Within at level 80, this trial is significantly easier than during its original release in Mists of Pandaria and will still award achievement credit.

Stun the caster immediately at the start of Wave 1, build Holy Power, and conserve mana for later waves.

Use Wings on Wave 2, stun the singer as soon as possible, and kick to interrupt its abilities.

Stun the large add, top off the debuff on yourself as soon as possible, Bubble off the debuff, and use BOP on the mage if he receives it.

Stun immediately and dispel, then stun a second time. Spend mana freely on this wave.

Use Sac before the enrage, stun the caster and kick after the DPS do, spend mana during the high-damage phase, and use Lay on Hands if needed.

Use Wings again on Wave 6 and conserve mana throughout this wave.

Use Hand of Sacrifice on the enraged target, use Lay on Hands if necessary but avoid wasting it, and spend mana.

Incoming damage is low on Wave 8, so stun and kick as needed and conserve mana.

Use Wings again on Wave 9 and conserve mana.

Use Sac on the enraged target, stun the small add, dispel, and spend mana. Drink during the intermission after Wave 10 when you leave combat to restore mana before continuing.