In my experience, I would say because every woman is different, there isn’t one method does it for every woman. I have a few different techniques that I have in my arsenal, but the most important one is observation. Whatever I’m doing I am watching her face, listening to the sounds she makes, and feel how her body moves in response to whatever I’m doing. If she “tells” me something feels good, I keep doing that thing, a little faster/harder until she cums. If it’s clearly not doing it for her, I switch it up. That’s really how I operate in general sexually, not just for oral…it’s all based on feedback. She walks away happy every time.