Board Thread:Frustrations and Venting/@comment-66.18.5.196-20141203053736

I have 2 7's and the rest 6's, and my deck power is about 70k. I look at the leaderboard, and there are decks with 120k which have 5's and they are cards that I got rid of because they were weaker and had lower deck powers when I had them. How does this work? Do they have secret weapons that are making it much better? 