How Do I Go Four and Three?

The American player is looking to build decks that could potentially win a tournament. Whereas from some other places in the world, people were playing not to lose. And rather than necessarily go and o and win the tournament, they were thinking about how do i go four and three? The game is played so fast that if you draw that card onf you go six and o, and you are so close to winning the tournament... You can't play it. It will be useless. But against a particular person or a particular common deck, at a particular moment, will completely turned the battle to the american player.