Playing with dozen patterns i figured out another system, that seems to work pretty well. It's a double dozen bet, and very easy to play. First i played against two pattens, but i prefer playing against repeats only.
Trigger: Wait for one dozen to repeat, and then when the repeat has ended and another dozen hit, bet for a repeat will not happen again. If it repeats again, stop and wait for the repeat to end and then bet against it will not repeat again...and so on.
progression 1-3-9-27.
i reached last step in progression afew times from the first testings. but i didn't bust
im sorry i've lost 3 games in a row from further testings. This is a very dangerous strategy. Perhaps it could work if another progression is used? I don't know.