You need to clarify the rules a bit I think. This isn't really how survivor works. It's typically an NFL game but sure it can work with NCAA as well. Generally it's single elimination and you don't pick against a point spread, you pick the games straight up but you can only pick any team once. That's kind of the whole point. You look ahead at a teams schedule and schematically plan when you intend to use that pick trying to outsmart the competition. It's real easy at first since you take the big favorites but as the season progresses it gets hard because you have used up a lot of the good teams. If the software you are using has survivor then I'm sure it keeps track of the teams a player has already picked so they can't pick them twice. You might want to try running a simulation and see how it works.