The equation to the scoring system (loser's score/winners score *20) should implement the time it takes to knockout the other players, I therefore have two suggestions.
1: The equation could take points if you were the first on knocked out.
losers score/winners score*20+number of people-people surviving when knocked out.
2: The score could use time it took to knockout all people.
losers score/winners score*20+number of rounds-average number of rounds used to knockout the * out of ** people.
*= 1st, 2nd, 3rd etc.
**= 1-5
The only problem with this would be averaging the games. We'd have to guess. Also, these equations are just thought and I certantly don't think that if we did use one of these methods that these would be the exact equations.