Watch out for falling rocks and random adds.

Hedetet

• Hailfire - Hide behind rock, then move out rock aoe.
• Shardfall - LoS boss behind rock, stack up on boss afterwards to avoid AOE

Defective Drone

• Aetherochemical residue - drop at edge
• When boss jumps out the arena, identify the defective drone (sparking, no lights) and stand where it is.
• When floating blades appear avoid as they will zoom across the arena

Mist Dragon

• Frost breath - heavy hitting frontal cone on tank, comes with ice puddle which debuffs. Needs extreme healing.
• Do not attack when in mist form
• Deep fog
  • Does two divebombs across the center of the arena
  • Can only see the telegraph if you can see the dragon
  • If you don't know where it is, spread to avoid everyone getting frozen
  • Run a circle around half way out and you should see it in time to avoid