At first I found this boss really hard, even at normal! After reading through this thread.
Don't know exactly who said it, but some1 said to just take it easy on this boss.

You just have to understand how you can counter each of his attacks, and execute it at the right time.

For example:
Poison nova => You have to be FAR away
Laser barrage => Keep moving
Persuit => Keep moving
Poison on the floor => Move

This is very basic and probly everyone knows this.
But as you know, for persuit and poison nova (something that can kill your team or an individuale instantly) can be avoided by standing far away from him.

So what I do is:
- Place my team far away from him (stacked)
- Tank him in a direction so i can see my team easily
- When he throws poison, just strafe to a side
- When he does poison nova, just keep dps'ing and only move my tank
- When he's going to persuit, keep dps'ing while running with my tank to my team
- When he's about to finish his persuit, stop my team and move him away from my team with my tank
- If he does laser barrage, again, run around, but make sure you are far away from him when he's about to finish.

Tbh, the key in this fight is to stay far away from him, even during and at the ending of his abilities.

I downed him with a team less then 4K gearscore, as you can see once again, GS isn't everything

Hope this helps anyone!


Ciao