If your AIS score or MCAT qualify no matter how borderline, I would suggest just focusing on your performance in the program. From what I gathered during our interviews, it didn't matter so much about how high your scores were after you hit the minimum required. The most important parts seemed to be the program GPA and the extra stuff like shadowing and if you don't have shadowing, then working on projects on campus. I had a 500 MCAT and a very poor AIS. They asked more about shadowing and my opinion on my performance in the program rather than my test scores.
Order of importance: (after getting qualifying test scores) Program GPA>> Shadowing/relevant experience>> test scores.