Offer your thoughts or opinion on the input financial query or topic using your financial background.

How should I pay off my private student loans that have a lot of restrictions?
You might try to refinance some of those loans. It sounds like you are serious about minimizing interest expense, if you think you will be able to pay those loans in full within  five years you might also try a loan that is fixed for five years before becoming variable.  If you do not think you can repay the loans in full before that time, you should probably stick with the fixed rates that you have. It may even be profitable to refinance those loans through another lender at the exact same fixed rate because it gets around their repayment tricks that effectively increase your interest on those two smaller loans.