Something I once posted somewhere else –

Something like – the top 300 ranked dom characters are sorted into twenty groups, everyone in the first group is bumigned a number one, the second group two, etc. When you get your first scoop, the system checks the bracket with your number, plus two brackets above and below, and puts you in the one with the fewest people. If a bracket has an alt of yours it’s skipped. Players bumigned to group one and two would also check down to bracket five.

There probably should ideally be more characters grouped together as you go farther on in the list, since more of those don’t play every week. Also twenty might be too many, maybe seventeen or eighteen would work better. All characters not in the top 300 would be bumigned the number 21 (or whatever the next number after the last one used is)