So using your logic, there is no such thing as a "best" coaching staff because we don't know what every coaching staff out there would or wouldn't do at a different school, and since no coaching staff has ever gone it's entire existence without losing a single game then there is no way to know if they are truly the best. Okay got it. Did I miss anything??
As far as those four games against Robbinsville, the 2014 team had a season ending injury to it's best player and several other key players were hurt much of the season. That team was never 100% and that's unfortunate, because when healthy they were absolutely the best team in the SMC. Rville posters will disagree and would never admit it and that's fine, but it is what it is. In 2015, Rville was just the better, more experienced team. This past year, Murphy was the better, more experienced team and they have a 15-1 record and a conference and a state title to show for it. Bottom line I guess is that the mark of a good coaching staff, IMO, is consistency and being able to make the most of a season with the players you have. Few (if any) do that better than Murphy's staff in 1a football.