I would put 0 into any junior,senior with a 3.0+. If they dip at midterm,will give 10. For fresh,soph I start at 10, will go to 15 if I get the warning. Any soph above 3.0 will start at 5. Never had anyone fail. In your case, would use the 10 for all till they reach 3.0. The ones that don't would stay at 10 to be safe.