If you go through Phase #1 easily but he is just too fast in Phase #2 and have a wide range attack with his tentacle, then this guide will help you!
How to Beat
Use a weapon with high deflection percent. Makes things easier to deflect. Hit and run tactics.
Don’t try to parry all his normal attacks.
Dodge them if you’re not confident. Always try to parry his red glowing attacks if you gonna use hit and run tactics otherwise you’ll be fighting him for the next 20 minutes.