Pract.us will alert you if you remove the Mentor role from a user and inadvertently leave one or more Skills without a Mentor. But with the new Mentor Inclusion Report, you can now see a detailed list of Skills where every Mentor is used, along with the total number of Mentors assigned to the Skill. This helps you know in advance, before removing a Mentor, which Skills are about to go Mentor-less and which will need replacements.
As with all reports, the new Mentor Inclusion report is available in your Profile > My Reports.
Included in app version 18.104.22.168.