By the way, I just fought three times with Ritter Runkel (about 2200) in a tournament, and I found he was incredibly strong. My strategy is kind of defensive, but he got a nice balance about the distance units should keep away from enemies. I thought pushing within the enemy's range would be punished, but it was me whose units received damage. Runkel didn't win just by scoring, but also dealt great damage on my units.
Therefore I have a thought that I don't know whether it is right. At least for "The seven wonders" and "Set your priorities" (1 base), being aggressive and keeping pushing is very important. I guess maybe one key is to push whenever there are enough allies near a unit.
Am I right? Or there is a better way to keep a good balance between being defensive and being aggressive?