Benny.
You come across as super super careful and super super cautious. Therefore any suggestions here are not going to meet your psychological parameters and therefore a waste of time. Going from memory you want low turnover and high POT in lieu of high turnover and low POT. Hence your opportunities are limited. You are faced with increasing your stake or the number of bets.

What ever you are doing now is working so continue it increasing your bets as a percentage of your bank. As your bank builds so will your profits. This will not be fast but it will meet your psyche. The otherway is increase the number of bets. I don't think that you are going to accept a lower POT so you have to find more systems that suit, and thus increase your number of bets. Happy New Year