Chosing the right step down depends on the material too - and you can use it in conjuction with
“plunge speed” (how fast the tool drills downwards into the material when it comes from the outside)
and “work speed” (how fast the tool moves when already inside the material)
to find a good middle ground between speed, accuracy, and tool wear&tear.
There is no comprehensive guide yet on which values are suggested in the two rotary module carving
modes (rotary/linkage), but this might help already to get a feel depending on your material: