For both of you, I would highly suggest that you use the OS SiM Collab roster and the sliders I made for it on Superstar difficulty. I haven't used any other roster for a while now, and I'm not quite sure what all would need to be changed if you set my *Other Rosters* slider set to Superstar difficulty.
You can certainly give it a shot and see what happens, but I would strongly recommend that you use the OS SiM Collab roster and sliders.