like over +250? depending on the sport imo.
baseball could be cause bad teams still win 70 games. even hockey bad teams still get 75 points.
the hardest part with RR is deciding which teams get their wins at the same time.
nfl to me is tough. bad teams suck and only 17 games. small sample size. jets can't even win so you would have lost every RR cause of them.
NCAAf to me is where this could work. anything can happen and 10 pt speads here are not the same at in NFL.