If I played, it would most likely be in bracket 7 or 9 based on your spreadsheet. Depending on how long it takes waiting for a match in a "no bots" league. If the wait is too long, I'd probably go for 6 or 8. 8 is the most tempting with 35% of the pool.

My concern with this many brackets is it's already hard to get players, this might dilute the play and increase wait times even further.