The most important skill in the Arena is playing the game. That may seem obvious, but too many people believe that the draft is more important. The difference between a good deck and a bad deck typically accounts for a 2-win differential on average. Drafting skill will account for about half of this win differential. You still cannot control what cards you are offered no matter how good you are at drafting! This means that in the difference between a 6-win per run player and a 3-win per run player, 67% of the difference is gameplay skill!