When fighting the Dynalyfos Duo in the City in the Sky, do not keep attacking them; they will block all of your attacks then hit you with an attack of their own. Take out your ball and chain and throw it at them. They will be stunned for a few seconds. Try to get in a few attacks. Repeat this strategy until they are defeated. Alternately, when you enter the room stay where you are and take out your bow and arrow. Combine it with the Hawkeye and shoot the Dynalyfos. They will fly back against the wall. Repeat this until they are defeated. Note: You should have 60 arrows. Arrows are weak against them and you are likely to run out before you kill them. Although arrows are weak against the Dynalyfos, it is better than rushing into the battle and losing a lot of HP.