Maybe just allocate them through proportional representation? Seems like that would pretty much fit the problem of representing diverse sub-groups naturally. F

Maybe just allocate them through proportional representation? Seems like that would pretty much fit the problem of representing diverse sub-groups naturally. For example say the demographic of "student-age backpackers teaching English overseas" was about 20% of the expat population. Then all else being equal you'd expect candidates who best represented this group to garner about 20% of the vote totals, and therefore gain 1-2 seats.