I agree that they are peaking at the right time, but as you progress farther into the year, the doubles point becomes more and more important. you should experiment with your doubles EARLY in the year, not when you get to the end and have tough matches to make it to regionals and nationals. Your doubles lineup should be set 3-4 weeks into the season. Then they have the time to mesh together as partners and learn each others games. Then, when you get to the big matches, you have solid teams that can win matches.