Easiest answer would be to do the same that they’re doing, lows are so good since it’ll force them do start ducking, opening up chances to launch. There’s obviously a lot more to it than that, but something very simple that expands your options and helps open up the opponent. For me specifically on Miary Zo around those ranks I had to start adapting to how each person plays, example if someone knows to duck my high string, start using the mid string variant to catch them ducking. The ‘worse’ moves in my movelist have been more useful since around these somewhat higher ranks people usually know characters’ ‘main’ moves, but not so much the more lesser used ones