Well Dante still has a lot more tricks then just his Devil Trigger, you need to limit Dante some more. Otherwise the way I see it as of now is The fight starts with the two crossing swords, they both back off Dante fires some bullets, Cloud does some running around and slashes at Dante, Dante uses Air Trick and cuts Cloud down from behind. Cloud could use some limiting as well, does he have omnislash or anything else that is not a spell? Because this might end up a mismatch if Cloud has only one spell and just his sword.
Ok here's some rule changes.....(Dante) No guns or Devil Trigger
(Cloud) Omnislash is available for use but only once, his spells are level one of all the basics (Bolt, Ice, Fire and Quake)
dante, his fast, strong and can survive a lot of punishment at the same time his sword sparda can extend into a huge halberd like weapon as well as other things