I also have Supercruiser, initially with SB 122 now on Fanatic Stingray 140 (better for me at 92kg+, often in ocean, need to get home when wind dies, and I prefer flowing longboard style riding)
No expert, but SO MANY MEGA FUN days riding the waves on SC on Melbourne Bay and open ocean
Definitely back foot out for waveplay
Then continual!!! adjustments - carving all the time (only needs gentle pressure), moving back foot, moving front hand especially (right up next to boom clamp in the gusts with back hand way forward), quick pumping in lulls to keep speed, lots of weight shifts as speed changes continually depending on where you are relative to wave faces, timing your turns onto and along the wave faces - static freeride straight line style does not work - foiling only needs tiny inputs to get results you want
So very active, flowing, working on timing

the more active I go, the better I do!

The stars on the videos make it look seamless - but they are making endless subtle trim changes to achieve that