Kakashi speedblitzes his ass so hard. Chouji in giant form is much slower than normal Chouji who couldn't outrun a missile.
Kakashi can still use his Raikiri, don't know why people think he can't. He just gets tunnel vision.
Raikiri Chain=Chouji the fairy in half.
Even finger genjutsu wrecks Chouji.
Actually, Kakashi can just grab some chips and throw it at the other direction.