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I've got a ghost a demon a jack and a genius. any idea what affect the order has?

It's generally best in this kind of game to have your tankiest characters in front and support in back. The exception would be if you have a hard-hitting character with really low defense; then put them in back, I'd say. My team is Heavy (High defense, low attack), then Demon ([ow defense [boosted with armor], high attack), then Hacker and Doc as support.