If there are seven games on the NFL schedule, the line may be set at Lucky Four sides create four single bets, one four-leg parlay. Spend time on the different sites for few days, analyse the odds before the start and end of the games, then start betting in small amounts, and. from a £6 Lucky 15 bet. . The overall wager is made up of separate bets, with 21 double. – Seven bets covering different permutations across three selections Lucky 31 – 31 bets covering different permutations across five. If that wasn't enough for you, this combo bet has seven different selections. These parlay bets paid big! Take a look at our favorite longshot NFL, CFB and MLB wagers with 8 to 15 legs that returned big payouts.