Question:
Roles that contain XX number of users i.e critical roles.
Answer:
Duso,
I'm not sure what information you need but SUIM has loads of reports which might be helpful. If you need a list of users for each activity group, a list of activity groups for each user or a list of users for each profile, it can help you. There is also a report which shows you users which have critical authorisations.
If that doesn't answer your question, maybe explaining a little more about what you want would be helpful to us.
Gill