I’m a beginner/intermediate level with no fight experience, but for me in sparring I use a tight “samson issan” guard with forearm infront. After a couple of punches, i get a rough feel of the punching power/rhythm and try to break the opponents rhythm by pulsing forward and push to create space. As the opponent tries to reset, teep/kick/knee or jab/knee combo. I also integrate long guard/ dracula guard to keep a constant range check and get myself composed again.
Whether or not it is as applicable in a proper fight, not sure. I love watching and re-watching the muay thai library, it definitely helps me in trying out all sorts of answers to such questions!
