Unfortunately, A grades with SAT subject test scores under 700 in the tests related to those high school courses suggest that your high school’s courses are not of very good quality, or are heavily grade-inflated.
The UCs only recommend SAT subject tests in some admissions situations: https://admission.universityofcalifornia.edu/counselors/freshman/minimum-requirements/examination-requirement/sat-subject-tests.html , although they can also be used in some situations to fulfill a-g requirements. The CSUs do not use SAT subject tests at all for admissions, except if they are used to fulfill a-g requirements. But the UCs and CSUs only give need-based financial aid to California residents or those under AB 540 (graduated high school in California after three years of attendance and not on a non-immigrant visa or some other similar situations).