This is a 50/50 Game, played with martingale.
Trigger: Wait until one dozen has been hit by 3 different splits, now you bet the remaining 3 unhit splits in that particular dozen, and 3u on the other two dozens.
Progression: Martingale. (i know this may be crazy, but it's how it's played) from the first tests i didn't go beyond 1-2-4-8-16. and that was a drawdown of ~600u, playing with 5u bet,
Recommended playing with 1u bets and a bankroll of minimum 200u, (playing with 5u bets a bankroll minimum of 1000u)
First tests was played with 5u bets (wingoal +500u, stoploss -1000u)
5/5 Games won
9/10 Games won
With a set wingoal and stoploss this one could be playable, perhaps...