In this video, we learn how to defeat Aster Protoflorian in Final fantasy XIII. First, activate the aerosol to make yourself stronger. Now, switch over to medic anytime you get hurt from the monster. Take hits where you can and use your different tools to help attack him further. Slash and burn when you can, then use double doses. Libra him when you get a chance, then Libra him again and he will turn red. Now he will have different weaknesses, so watch out for these. The best way to defeat him for good is to stay medic until you get to the half point. Then, use dual cast to stagger him and you will kill the monster!