International full pay. Where to ED?

Demographics

\- International student from East Asia
\- Female
\- Attended high school in the U.S.
\- Currently on a gap year
\- Full pay / no financial aid
\- Test optional
\-TOEFL 110

Academics

4.11/4.0 W
Graduated as summa cum laude
10 AP

ECs
\- Government / law-related activities for several years
\- Model UN
\- Some computer science/programming experience
\- State-level recognition in academic competition
\- Part-time/family business experience

Intended majors
Thinking about:
Sociology
History
Asian/East Asian Studies
Political Science
Anthropology

College list
Mostly looking at T20–T40 schools, including schools like Cornell, Northwestern, Vanderbilt, Rice, Emory, NYU, USC, Tufts, Michigan, etc.

I applied to selective schools last year and didn’t have a great cycle, so I’m trying to be more realistic this time. (Although I got into cmu, umich)

Main questions:
\- How much does being full-pay international help?
\- How bad is test optional for internationals?
\- Does a gap year hurt?
\- Which major fits my profile best?
\- What level of schools would be realistic target/reach/safety for me?

Most importantly: where should I ED? I’m currently thinking about NYU LS Core or Boston U