We all focus so much on how the weak/mid trio are gonna defeat powerhouses like the Tobi Roppo that we forgot something very obvious : Onigashima is currently floating in the air. It could be a game changer because it means characters can be defeated by simply being kicked out of the island, DF users would then fall into the sea. For example, maybe someone like Usopp could use his sniper skills to send Page One flying far enough to make him fall into the sea.