Hi? What is the format of the dorm mates you are going to hire? I think i am in 16M now. So what is next? Or who is next?
If you want a balanced build, you'll want to put in Football Varsity guys and Math GENUIS guys next. Don't upgrade them past Level 1, as it's a waste of money. Some people say that putting in the 10B people is a waste of money (after 600m tier), and it probably is, but it helps you to gain money to put in the 40B and 80B dorm mates. It's really up to you how you upgrade and which tiers, if any, you skip. Hope that helps!