In the center, I took the objects up to level 127, found wings, and added more creatures; the stats were also around 20.
At level 127, I found the Castle, and at level 131, I captured it. Ksemiya saw this from her vantage point and surrendered.
In fact, there were no real chances left for her. Over the next couple of days, I took the center completely without any interference.
Thanks for the game!