Low ACT Math and SAT Subject Test, next steps?

Hey all, I’m looking to apply to Harvard, Princeton, Tufts, and, MIT. My current scores is 33 in one sitting, and 34 super score with a range of: (33 composite) 32 English 35 Reading 32 Math 33 Science. (34 superscore) 34 English 35 Reading 32 Math 33 Science.
I was getting 35’s during practice for math, however, I didn’t do as well on the actual test.

My SAT subject tests are 740 Math 2 and 700 Physics. I plan on taking the SAT Subject again later this month, hoping to aim for 800 for both ( I wasn’t prepared previously).

Should I just go for the 800 on my math to compensate for my low math ACT score? or would i have to take the ACT again? (I’ve already taken it thrice) Thanks for any help.