I would just do random seeding unless you have a proper system in place. Also the map pool should always be the ladder pool, but maybe take out maps like sky island and red city, which blizz will hopefully remove anyway by the next rflan.
I think it should be clear what map we start on, or have a proper veto system in place. Either veto until there is three maps left and the person who veto'd first gets first pick, then losers pick. Or each round has a set starting map, then losers pick!
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