SAT 2150 with Two Weeks Prep; Need advice to improve

My high school senior daughter was busy with many ECs and up until the middle of May she was busy taking multiple APs. After that, she had about two weeks to prepare for the SAT on June 6 and scored 2150 : Math - 800, CR - 700, Writing - 650 (MC - 67, Essay - 8). I believe she needs to take this test again to get her CR and Writing scores in the 750+ range, if possible, in case she wants to be really competitive in the schools that she has set her eyes on. She has already taken the SAT Subject tests in Physics, Chemistry and Maths-2 and has scored 800 in each of the three tests.

I need help from the forum participants with advice on how she can focus on CR and Writing and improve the same.She has time until October 3, the next test date. Practical advice from those who have improved from similar scores would be highly appreciated. If anyone can refer me to any other posts or links that serve the same purpose, that would be helpful too. I am looking for a study plan for 3 months aimed at taking the CR and Writing scores to beyond 750 each.