We may have different views about slots but this game for me is based purely on luck.

A 5% house edge is too high, no one that will take this game seriously will win and enjoy a long-term success, all of them will suffer the taste of defeat. Also, you cannot implement a strategy to its fullest which is the martingale as definitely the house will set a limit so they'll always win.

Just take it easy, don't complicate your way of having fun, there's no way you'll win here unless you are lucky.