I continue to sculpt until I am happy with a basic silhouette. I don’t bother with details or anything, just enough that I can easily retopologise.
If I want to add more detail, such as in the nose, I will take my new retopologised model back into zbrush and subdivide from there. But anyway…
Once I’m done with the basic sculpt I export it as an obj to Maya. From there, I can make my model live and use Quad Draw to redraw my mesh. I need to keep in mind that my loops need to have even numbers so I don’t end up with tris when I start merging edges.