first you need to sort by version. then you might be able to sort by rating.
however, I would assume that there are not very many users even know about the rating system for styles so it is not going to be very accurate.
pick one, pick ten, just install some and see what you think. then if you decide on one uninstall the rest and delete them from your server.
no need to make this so difficult.
I am available for custom work on a donation basis. Please send me a PM with your needs.
Premium phpBB 3.2 Styles