Unlike MD schools, for the most part, there isn't a huge difference between each of the DO schools (not like the difference between Harvard and FSU). There is no clear cut top 10 list of DO schools. Ask 10 different people for the #1 ranked DO school and you'll probably get 10 different answers.
There are subtle differences, though, such as how much time they put into OMT, the percentage of people who pass the boards, reputation, location, etc.
For me, the most important aspect was location. I didn't want to go to school too far away from Florida so I applied only to eastern schools (and Oklahoma for some unknown reason).
Your friend should think about what is most important in a school, and then research different schools with that in mind.
The point is, don't just use stats to decide where to apply. His/her MCAT score won't necessarily be the thing that gets them accepted or rejected from any particular school. The difference between the school with the highest accepted MCAT average and the lowest isn't really that far apart. So if their scores are good enough to get into one DO school, they can probably get interviews at most other schools. That's my opinion, though.