How do I know when to change strategies?

The key is for players to recognize that they are falling into a pattern, once the player on the other side recognizes how you like to play, then it is time, they are getting comfortable playing against the style or pattern. the performance of the opponent becomes better, so the reason people lose matches is they don’t recognize that they have given the opponent the information to play better, because the are aware of the pattern. Players need to see why the other play is starting to play well, not just to think they are playing bad.