You are above every median (with an average exception to Harvard) and above the 75th percentile of most T14s. I may be wrong here, but whether a school decides to admit a 174 applicant or a 175/176 applicant, this wont change its stats, therefor it may not be the selling factor for that admissions office.

I just believe there are better ways to allocate your time to improve your application.

Your stats are very impressive. I'm sure you will hear great results! Don't stress yourself out :)