I like Riordan if Rencher plays under control and doesn't try to single-handedly take Salesian down. Last year's Open final vs Salesian he played his worst game of the year and I dont believe he scored. The Forum will be rocking / filled to the rafters no doubt.
If Blair isn't playing then I'd have to favor Folsom but if Blair is playing at 75% then I think DLS will beat them down and win by 10-15 points.