Spamming that Astora Greatsword weapon skill can do you wonders.
Dark Souls 3 - watch a dude cheese Abyss Watchers with Astora Greatsword
The Astora Greatsword in Dark Souls 3 features a very unique weapon skill for a sword. The move allows you continue thrusting towards an opponent, hitting them multiple times and stun-locking them in the process.
He even edited in the Call of Duty hit confirmation sound and graphic to highlight the hits. Take a look: