light on your feet/foil after passing the crest or traversing crests at an angle seem to work best for me
I got in a great rhythm going out through sharp 2'+ chop and swells in a river mouth a week or so ago, it was surreal to go ~20 knots close to the wind, straight through waves that had boats <40' slowing down.
I think the "light on the feet" part was key, once I had that rhythm down, and kept the foil low enough to be out of the steepest part of the waves, then trying to become "weightless" through the back of the wave, it was really unexpectedly smooth.
Just had to figure out how to get the wave to only lift me a little, and preserve foiling height by not bearing down or trimming aggressively through the back of the wave.
I thought I was pretty special for a few minutes. Even the coast guard stopped to watch.
Then I banged head on into a 3 foot breaking whitecap and had to go at another angle to get back on foil, etc.
Pure swell without whitecaps or breaking sections is similar as far as I can tell, but smoother of course.