Always try to stick to one wall and charge up a nail art (dash slash or great slash) everytime he uses his spinning shield attack go to him and attack DON'T BE GREEDY and immediantly go back to the wall after your attack healing is kinda difficult and can only be done during his shield attack however I can't recommend it

Practize Markoth on Ascended in the hall of gods Only try to attempt P5 after you can beat him 3 times in a row while being over 7 masks the douple damage will also help you not to be greedy with healing or damage