Seen people have trouble with this bastardised bastard of a mission... Here to help. Essentially this boss has a lot of powerful ranged attacks, and a shield + shield bash. As you can see in the vid, circling around him works wonders. Make sure you are capable of eliminating the ads as quick as possible. The bonus battle log is behind the spawn a decent distance away.
Additionally, I show my improved build at the end of the vid for anyone interested. You can switch out the melee however you like and the plasma missiles are there for versatility. Really helps with ads