Not sure if this would be considered a review ring. I moved to Namibia and am living here for a few years. When I started reviewing here, I saw that the queue is super long, with a dedicated base in the country’s larger towns. I submitted a few, but I know there aren’t a lot of people here. Are people able to change their location to help review in other countries?
Welcome to the forum 
You can ask people if they can set their bonus location to your area to assist with reviewing. This would not be a review ring. Wayfarers can change their bonus location every few months (?).
A review ring is when you ask people to review specific nominations and accept them regardless of them being eligible and passing criteria etc.