Best record is #1 seed in bracket 1, second best is #1 in bracket 2, 3rd #1 in bracket 3, 4th #1 in bracket 4.
Then you work back snake-style: 5th is #2 in bracket 4, 6th is #2 in bracket 3, 7th is #2 in bracket 2, 8th is #2 in bracket 1.
9th is #3 in bracket 1....and so on.