How to find a good tutor (and not just one with a personal high score?)

Hi! I am trying to find a tutor to help me break from low 170s to the mid-high 170s. I have seen a lot of advertisements/posts online where it seems like the tutors' main draw is their own high LSAT score. This doesn't necessarily mean that their pedagogical skills are top-tier & tutors are VERY expensive, so I was wondering if anyone had any recommendations of specific tutors/tutoring companies/etc who have experience teaching and demonstrated track record of improving scores? My budget is up to 250/hour, but can go higher if needed.

Also, tangentially related question, but how many tutoring sessions/hours did it take for you guys break the low 170s plateau?