How about every player gets to subtract 5 points only twice during the entire game, and cant add any more. Also, the -5 can only be used on one character. If not, this game may take forever, especially if people end up healing/hurting Samus/Link at the end.
Second'd. We should all use our minus 5s to get rid of all these below 10 people taking up spots lol
omgwtfbbq's plan works well too