Read Creating JReviews Menu Items for detailed steps on how to create a JReviews menu item.
The Reviewer Rank page displays the list of users based on the number of reviews they had written and the percentage of helpful reviews.
Example of a Reviewer Rank page can be seen on the JReviews demo site: http://demo.reviewsforjoomla.com/reviewers-rank.
The Reviewer Rank menu item has these parameters:
Limit per page - how many users will be shown per page.
Theme suffix - enter a theme suffix if you want a specific theme file to be used for this page.