You can try Academic Coach Tutoring. My kid got 770 on reading/writing. Tutorting might have helpe a lot. He only did two practice tests, once last year and once a few months ago. He got like 670 to 690. He did two 1.5 hour tutoring sessions in less than two weeks and scored 770, a big suprise to me. He only did homework assigned and did not do more practice tests.