This fight requires luck. LOADS of luck.
Basically, it's tank and spank all the way, except there's infernals that drop randomly. These have an AoE hellfire, but don't move. Basically the goal here is to dodge these infernals, and keep up the main tank. Trouble is that if inferals keep landing in bad places (on or near the raid), you'll have no-where to go. This gets really bad in phase 3, as the infernals start landing like crazy. Also, as of patch 2.1 the boss can STILL BUG! He'll become untargetable, and, as stated above you need to go and grab a trash mob to make him aggro you.
Basically, it's tank and spank all the way, except there's infernals that drop randomly. These have an AoE hellfire, but don't move. Basically the goal here is to dodge these infernals, and keep up the main tank. Trouble is that if inferals keep landing in bad places (on or near the raid), you'll have no-where to go. This gets really bad in phase 3, as the infernals start landing like crazy. Also, as of patch 2.1 the boss can STILL BUG! He'll become untargetable, and, as stated above you need to go and grab a trash mob to make him aggro you.