well frist off have pleny of cure cards and use them as one card until u feel the need to make a sleight out of them. also have high level attack cards and plenty of cloud cards. BUT DONT NOT USE OMNISLASH!!! when hes about to use the charge technique, card break it and u should end up relativly near him, at this point use all the cloud cards u can on him. cure as needed and card break his attacks when u can. it might be helpful to put a few zero cards in there. i dont use them personaly, i just break him with 9 cards. when u break him jump up IMMEDIATLY and try to tag him a coupla times with key cards. u can only hit him about 2-3 times so it may take a while. like i said when u break is charge, ull be relativly close to him and just use cloud on him. if its still to hard i suggest leveling up a bit. just keep breakin, healing and cloud card the shit outta him. hope that helped