This was not too hard can become overwhelming if you get stuck in the middle of them all.
Use him and body guards until you make your combo turn red and press
+
to perform an execution on him. Watch out for his smash attacks they will stop your combo and take a bit of health off you.
You can use arrows on this guy which helps take his health down from a distance also if you are struggling for health there is 2 herbs just on the outside of the green area, but you will have to grab them quick as the warning message saying leaving area comes up.