Well, I can only share what I know and my opinion, I have only been testing flat betting and positive progressions.
Where I aim to catch one sequence and been trying to play both.
1) Regression Up & Pull
2) Up as you win 1248
3) Up as you win flat betting twice then increase half unit for each win
4) Up as you win 1326
5) Up as you win Guetting progression
Cheers