Thinking about how this could go badly (ie be a boring video). I don't know what it says about me, but I feel like the optimum strategy might be mutually assured destruction. Announce right at the beginning that you will 100% cooperate. You will take all of the risks. You will take the worst option if given a promise of splitting, etc. But as soon as anyone else does anything less than 100% cooperate, you will tank. Not play to win at others' expense, but play to ensure that overall the amount everyone else gets is as low as possible, even if it means you have to nuke New York.