With some work around the evil vortex who despawns pets and drops their threat, Malygos is down. A very intense fight which relies a lot on gear (don't recommend trying this way below 370), and a little on RNG - damn you sparks and your directions.

Music: Oceanlab - Satellite (Original Above and Beyond Remix)
Oceanlab feat. Justine Suissa - Sky Falls Down (Armin Van Buuren Remix)