This guy is hard as hell in NG+, he drains 35 VIT in a second. Better to stay mid/close range so he won't do that attack as much
Here's how I did it: https://www.youtube.com/watch?v=zUv9sVQUBZU
He's fairly easy to parry. His attacks are so quick that the second you see him start his animation, just shoot him. The only thing you need to worry about is that he might occasionally use the
tentacle arm thing which can't be parried
Then get in close and f*ck his sh*t up. You'll see above that he's easy to stagger and force back.If you're that close, he never uses his AOE arcane attack either.