i went back and played Lost Odyssey... i very great RPG game... and i bought the new DLC for the game and im having trouble beating the new boss... the Killalon.... my characters are all at higjh levels and i still get my butt kick... is there some kind of item i need to get so i can make to battle easyer... anyone that knows how to deafeat him please comment or if you know someone who know please ask.... i need to defeat him to get the last achievement

How do you kill the KillAlon in Lost Odyssey?