High stakes players willing to hear strategic suggestions and giving the mentor a cut on their profits simply want to get more winning hands than losing ones.
They do not give a fk about progressions, stop losses or MM issues.
They mainly like to adopt a wise flat betting strategy as they know that at worst they won't lose more than math expected (minus the huge comps they are entitled to get or deals on losses made with the casino).
A luxury almost no one bac player in the world would think about.
Thus only a proper bet selection might have the best of the game by 1 trillion of certainty.
There's no way a math disadvantage could be overcome by "human" countermeasures like MM, stop losses and progressions: such are just human illusory worthless tools.
If our plan is properly set up, the more we'll play the more we'll win.