No ones rolls more often & more effective than Joe Mela.
Indeed, Joe "The Technician" Mela is one of the best rollers in disc golf. As a lefthander, he uses a backhand roller to accomplish hard left hand turns on holes that favor righty hyzers. He also uses rollers to achieve long distance throws.
Imo, at times however I think he opts for the roller when a simple airshot would be preferable. I can think of one instance in particular: in a tournament several years ago at Tinicum, Joe chose to thow a roller on hole#4 in the A position. This hole plays slightly uphill through scattered trees and is no longer than 150 feet long. It seemed strange to me that a 1000-rated player with exceptional short game and putting skills would choose to roll a 150-foot hole.