Would raising Math and Science subscores on ACT while lowering composite score be beneficial?

I took the ACT for the first time as a sophomore last April and got a 34 composite (35 E/33 M/33 R/33 S). I almost certainly won’t get 35 E and 33 R again if I retake the test—I’d probably get 33/31 at most.

However, I’m pretty sure I could get 35 M and 34 S in a second sitting. 33/35/31/34 is a 33 composite but I understand MIT looks at the highest subscore in each section without superscoring. If they superscored, retaking the ACT would obviously be worthless (35/35/33/34 is still a 34), but since they would consider the subscores on their own would raising the M and S be beneficial?

Additional context: my highest SAT M is 770 (working on a 790) and I have 800 Math I/790 Math II subject tests. I will be taking the AP Calculus AB exam next month (junior, so it can be considered in admissions) and my senior courseload will include Calc BC. I’ll also be taking the Physics SAT Subject Test in October or November.

I may also already come off as test-obsessive (planning on at least four SAT Reasoning sittings), which is the primary reason I’m considering not retaking the ACT, but I think the fact that standardized testing is one of the only enjoyable extracurricular activities available in my town of 200 is a fair enough excuse for that.

tl;dr: should I retake a 34 ACT to potentially improve M score from 33 to 35 and S score from 33 to 34 while also taking at least 19 other standardized tests in high school (4+ SAT, 4+ Subject Tests, 10+ AP, 1 existing ACT)?

I would guess admissions would be more impressed if you spent time on other things.

MIT superscores, so it does not make sense to redo all of these tests if you have good SATs. However, if you are thinking of only sending ACTs, superscore would help you there too because MIT would only see the highest scores in each section.

But as said above, MIT is looking for more than just test scores. I went to their admissions information session and they seemed to explain that they take extra curriculars and grades into account more than test scores.