please find below a SCN document the business role suggestions with the KB referenced at the bottom.
Recommendations for using Business roles provisioning in access request
if you have your system operating with the job running and no issue to GRC repository could you add your comment as this was written by a SAP employee.
by technical, I mean PFCG role (single, derived or composite)
Also, I'm referring to GRC 10.x if there is a difference in this scenario to 5.3
regards
Colleen