Act prep advice

Hello, I have a 17 year old junior that needs serious help ACT math. Math has never been her strong subject but we have been surprised she is in 16-18 range. She has been tutoring for about 3 months with no improvement. We are willing to spend the money but with lack of time and resources want to make sure we are putting energies where they will work. She has had educational testing and scored in average intelligence with only notable thing being low working memory. She also suffers from OCD,anxiety. I know she will be fine in college as long as she stays away from math!! Please help!!!