hi- i am looking for some ways to help get into Tufts University, or stand out from other applicants? :)

If your score remains low, the test-optional policy will help because it can't hurt you (Tufts average is 1460). If you score is around or above that, submitting an SAT even though it's optional will look good. Your GPA is strong, so focus on your SAT. Make sure to have taken AP US Government and AP Comparative Government, if your school offers them. If your school is IB, look into IB Global Politics.

Enjoy your day and stay healthy.

With Tufts going test-optional it will be interesting to see if anything happens with regards to the class that is admitted. If you decide not to submit your SAT score they will look at your grades and ECs with significantly more weight than they would normally. It sounds like you're confident in your ECs so that might not be a bad thing! Make sure you try to do some ECs related to your intended majors but they don't all have to be.

How many APs are offered at your school? They're going to look to see if you challenged yourself as much as you could have (taking all honors classes will help) and if your school offers a lot of APs you might want to see if you can fit in one more somehow. I know that's probably difficult now but any little thing helps.