Some idea:
- Martingale with Fibonacci progression 1, 1, 2, 3, 5, 8, ... ;
- Reverse martingale using the highest % win chance and then increase the bet if win (with % increase less than the payout). For example: use 98% win rate and 1.02% payout. If win, increase the bet by 0.5% (less than 1.02%). Reset if loss and x consecutive wins (try 80).