Multisite subscriber role

I’m a bit unclear about roles for subscribers.

I want a simplified admin menu for subscibers, on their subsite. But when I modify then menu and remove certain items, they are then removed from my own menu, and I can’t find any other way to access those items.

It appears I may be able to make subscribers ‘Editors’ instead of ‘Administrators’, but then I’m under the impression they don’t have permission to upgrade their account, etc.

Can I get some clarification on how to simplify their admin menu without limiting the acces I have, but still allowing subscribers to do whatever other actions they may need to do?