Help with Act 4 boss...

So I am obviously new to ARPG's and I need someone to 1 shot this thing so I can get the Bird Mount then I can just chill mapping. I will not be able to beat this guy for weeks after farming and upgrading. I can venmo you or whatever lmk. Like I said I just want the bird lol. I'm new here also I will try to figure out where the messages/inbox are.

Edit: Just figured out its attatched to a spirt gem and you can buy it on exchange. Disregard