I haven't been playing this game very often and I am way behind in season 2! Well, at least now I am in the middle of it. And I would like to catch up to players all the way in season 7. But I don't know how to do that or what is the best way to get to that level. I keep thinking by the time I get to season 7 season 9 will be released by then. What should I do to improve?