Remnant: From The Ashes [ Onslaught boss fight, Max Difficulty no damage taken, solo kill ]

This is my 2nd playthrough of this game (1st playthrough was on hard mode, currently on apocalypse).
The 9th boss I encountered in my apocalypse difficulty playthrough. This guy is pretty manageable for the first minute but once those stupid teleporting goats start coming shit starts happening and things get rather unpredictable.
Loadout: Devastator (built-in mod: Skewer),
Hunting Pistol (mod: Swarm),
Full Slayer armour set,
Razorwire Necklace,
Ring of Evasion,
Burden of the Gambler
Traits: focused on ranged damage, crit chance, crit damage
and maxed out stamina