IMO, the 12 seed is ideal. My ideal seeding would go something like: 12, 13, 11, 7, 10, 8, 9.
The idea being that as a 12 seed you play a 5 seed, then play the winner of a 4/13.
As a 13 seed you play a 4 seed, and play the winner of 5/12.
As an 11 seed, you play the 6 seed, and the winner of 3/14.
As a 7 seed, you play a 10 seed, and the winner of 2/15.
As a 10 seed, you play a 7 seed, and the winner of 2/15.
As an 8 seed, you play a 9 seed, and the winner of 1/16.
As a 9 seed, you play an 8 seed, and the winner of 1/16.
I would prefer to play 4 or 5 seeds if possible.
The thing is, our seed is likely already set, if we make the tournament. Bubble busters are going to knock out teams that would have been seeded lower than us, and the bubble busters will have seeds lower than us. The only thing that really shifts is how they pair everyone to make things fit their ideal geographical distribution.