MTG Salvation

I love the Idea of a Five Player format that encourages players to aid their allies. One way would to make the game three rounds. Each round is scored. If you eliminate both of your opponents and both of your allies survive you receive 3 points, if you and one ally survive you receive 2 points. So if player A eliminates his opposition and has two allies remaining he receives 3 points and both his allies would receive 2 points each. A Sole survivor receives 1 point. At the end of 3 rounds the player with the most points is declared the victor. If two or more players are tied for 1st then a 4th sudden death free for all round ensues. I would love to take this even further with friends and preplan a mono color deck build with each person representing one of the five colors.