Mystic Ally

Mystic Ally is a Focus Monk skill in Diablo III, unlocked at level 22.

In-game

A male Mystic Ally

Passively summons a permanent companion: the spiritual copy of the Monk. It follows the Monk around, attacking enemies with the same attack speed as the Monk, dealing 130% damage as Physical per hit. It cannot use any of the Monk's skills. The Ally can be killed (has the same Toughness as the Monk), but is automatically revived in 5 seconds.

When activated, increases damage done by the Ally's attacks by +50% (to 195% damage as Physical) for 10 seconds.

Costs no Spirit, but has a 30 seconds cooldown for active use.

Runes

• Water Ally: damage type changes to Cold, and attacks Chill enemies for 2 seconds, slowing them by 60%. When activated, instead of damage buff, the Ally transforms into crushing wave for up to 15 seconds, dealing up to 7 attacks for 625% damage as Cold each. Enemies hit by the wave are Frozen for 3 seconds.

• Fire Ally: damage type changes to Fire, and also increases the Monk's damage by 10% (not multiplicative to similar modifiers). When activated, instead of damage buff, the Ally turns into 10 smaller Allies, each exploding for 290% damage as Fire. Once all of them detonate, or after 15 seconds, the Ally's normal form returns.

• Air Ally: damage type changes to Holy, and also increases the Monk's Spirit regeneration by +4 per second. When activated, also restores 100 Spirit to the Monk.
  

• Enduring Ally: also increases the Monk's Life regeneration (the amount scales with level, up to 10728 at level 70, and is further increased by 30% of the Monk's own Life regeneration). When activated, instead of damage buff, sacrifices the Ally and heals the Monk to 100% of maximum Life. The cooldown increases to 50 seconds.
  

• Earth Ally: also increases the Monk's maximum Life by 20%. When activated, instead of damage buff, turns the Ally into the rolling boulder for 8 seconds. The boulder rolls over enemies, dealing 380% damage as Physical per second and knocking them up for 1 second.

Non-rune enhancements

• The Crudest Boots (Legendary Boots): summons two Mystic Allies at once. Their passive bonuses do not change, but their activated attacks are duplicated.
• Tasker and Theo (Legendary Gloves): increases Attack Speed by 40-50%.
• Enforcer (Legendary Gem): increases damage by 15% (+0.3% per rank) and reduces damage taken by 25% (rank 25 bonus).

Monk Skills

Primary Skills
Fists of Thunder • Deadly Reach • Crippling Wave • Way of the Hundred Fists
Secondary Skills
Lashing Tail Kick • Tempest Rush • Wave of Light
Defensive Skills
Blinding Flash • Breath of Heaven • Serenity • Inner Sanctuary
Techniques
Dashing Strike • Exploding Palm • Sweeping Wind
Focus
Cyclone Strike • Seven-Sided Strike • Mystic Ally • Epiphany
Mantra
Mantra of Salvation • Mantra of Retribution • Mantra of Healing • Mantra of Conviction
Passive Skills
Resolve • Fleet Footed • Exalted Soul • Transcendence • Chant of Resonance • Seize the Initiative
The Guardian's Path • Sixth Sense • Determination • Relentless Assault • Beacon of Ytar • Alacrity
Harmony • Combination Strike • Near Death Experience • Unity • Momentum • Mythic Rhythm
Removed
Guiding Light • Mantra of Evasion • One with Everything • Pacificism • Provocation
Cut
Impenetrable Defense • Radiant Visage