I would probably suggest spark ability. When Magalor shoots projectile just press 1 and shake. It helps defend yourself against it. You should have at least 2 players with you because Kirby is not exactly the best at attacks. He may summon sharp things that can hurt your character and throw enemies. Magalor could even summon a portal, when he does that run away from it. If you are caught in it, it will do a lot of dmg. Hope i helped!