It is easy, although it may seem counterintuitive, if you equip a Mystic Beast with padded protection that reduces physical attacks in addition to water damage in exchange for reducing its mobility. This, added to its natural resistance to wind, leaves it only with the fire element that it still has. You can increase its resistance with other equipment and it also has a wide range of attacks and abilities that allow it to move even if the diaper does not allow it to walk. He is simply the best tank in the game and looks great with this build.
Don't forget to turn your back to the enemy to provoke him.
