Why not just take the spread -4, risking 110 to win 100?
It seems like a large risk when the only 3 scores that you are betting on are -1, -2, -3.
You get 1 to 2 odds on -1, -2, -3 and 1 to 1 odds on anything over that.
By the way this is a legitimate question, im new to all this.