If you cut the amount of games, and increase the amount of time spent on each game, I believe that you can raise your %. You can spend your extra time, not only studying your moves, but your enemies moves as well. Pay very close attention to your forts, and try not to leave any armies behind the front lines, unless they are there for deterrent purposes. Pick the most complicated maps that you can, and learn them. Once you do, then try out some speed games on those maps. One last thing, grab a hold of a high ranking Freestyle player, to show you the ropes. I personally hate Freestyle, but most of the top players on the leaderboard got their points from playing it exclusively.
