There is no definitive answer to this question as there are a number of factors to consider when choosing a yts proxy site. Some of the factors include the speed of the site, the number of ads, the privacy policy, and the security features. Some people might prefer a yts proxy site that is fast and has a lot of ads, while others might prefer a site that is slower but has fewer ads. Ultimately, it is up to the individual to decide which yts proxy site is best for them. For more detail info read this blog.
Source: https://infomafia.net/yify-proxy-and-mirror-sites-list/