9 numbers call for ATILA.
I suggest you try the reversed ATILA where you rise +1 on only one of the 9 numbers on a win, and hold the bet until a new hit, after which you rise +1 on a second single number, holding the bet until another hit...
You reset when a hit brings your balance to a new high (or break even).
The sequence goes like this:
1.1.1.1.1.1.1.1.1
hit
2.1.1.1.1.1.1.1.1
hit
2.2.1.1.1.1.1.1.1
hit
2.2.2.1.1.1.1.1.1
hit
2.2.2.2.1.1.1.1.1
hit
2.2.2.2.2.1.1.1.1
hit
2.2.2.2.2.2.1.1.1
hit
2.2.2.2.2.2.2.1.1
hit
2.2.2.2.2.2.2.2.1
hit
2.2.2.2.2.2.2.2.2
hit
3.2.2.2.2.2.2.2.2
hit
3.3.2.2.2.2.2.2.2
hit
3.3.3.2.2.2.2.2.2
hit
3.3.3.3.2.2.2.2.2
and so on. Rising +1 on one number at a time.
I suggest you try the reversed ATILA where you rise +1 on only one of the 9 numbers on a win, and hold the bet until a new hit, after which you rise +1 on a second single number, holding the bet until another hit...
You reset when a hit brings your balance to a new high (or break even).
The sequence goes like this:
1.1.1.1.1.1.1.1.1
hit
2.1.1.1.1.1.1.1.1
hit
2.2.1.1.1.1.1.1.1
hit
2.2.2.1.1.1.1.1.1
hit
2.2.2.2.1.1.1.1.1
hit
2.2.2.2.2.1.1.1.1
hit
2.2.2.2.2.2.1.1.1
hit
2.2.2.2.2.2.2.1.1
hit
2.2.2.2.2.2.2.2.1
hit
2.2.2.2.2.2.2.2.2
hit
3.2.2.2.2.2.2.2.2
hit
3.3.2.2.2.2.2.2.2
hit
3.3.3.2.2.2.2.2.2
hit
3.3.3.3.2.2.2.2.2
and so on. Rising +1 on one number at a time.