Should I retake any of my tests/ACT scores help?

Nope. You would be a-wasting your money!! Your ACT is a point from perfection so you've got that covered. That's a grand score even for MIT and Stanford. Regarding the SAT, don't submit it. Just use your ACT score and you'll be good. Trust me. For you subject test, most schools require (or recommend) you to submit only 2 scores: a math and a science. Your Math II and Bio E scores will definitely suffice for this. I truly don't think you need to retake any, but if you decide to, work on your 2 subject test scores and see if you can get closer to the 800 mark.