Seems a reasonable ask…he effectively wants to shoot vfx, he should expect a little testing to ensure the result is what he wants! No such thing as a simple greenscreen.
I got some test footage and quite frankly cannot see any difference with the raw vs 10 bit other that the raw is true 4k and yhe 10 bit is UHD. Master keyer on each file looked the same and so was the grain structure.
There was a little difference in the “feel” when grading the highlights but was still able to achieve the same look
this is a social spot only and talking head to camera. Im not going to bother with the raw workflow