Arcane Anomaly

Dalaran
Climb out of the sewers and clear the city's terrace, gardens and commerce district. Find Arcane Anomaly on the terrace and Unstable Sentinel in Magus Commerce Exchange; include Arcanic Enigma for Power Overwhelming. Clear the enemies around Mana Devourer before pulling it, and collect the city quest objectives before going up to the Violet Citadel.
Arcane Anomaly
Focal Blast demands movement out of a frontal beam between Arcane Bolt hits on the tank.
Abilities

Arcane Bolt
Hurls a magical bolt at an enemy, inflicting Arcane damage.
Prepare healing for Arcane Bolt on the tank; moving out of Focal Blast does not remove this damage.

Focal Blast
Channels energy forward dealing damage to any targets caught within the blast.
Sidestep the forward beam when the channel begins and keep clear of its path until it ends.
Tank- Keep movement available for Focal Blast instead of standing in its forward beam to maintain attacks. Use magic mitigation for Arcane Bolt when available.
Healer- Stand away from the beam's forward path while keeping the tank in healing range for Arcane Bolt. Move with Focal Blast rather than trying to heal through the channel.
Damage- Leave the front of Arcane Anomaly as Focal Blast begins. Resume attacks from a position outside the beam rather than trading health for channel uptime.