Problem with the 9.
Although counting the 9 as -1 helps with BC a little, you lose more power because:
a negative 9 hurts your IC (Insurance, most important play you can make).
it also hurts your 12 vs 2 12 vs 3 play indices.
You would do much better overall with:
-2, 1, 2, 2, 2, 2, 1, 0, 0...