Favorites, to battle! - 6 - The Battle of Favorites! - 6

If you can't take the second castle, then level up your hero and take the third.

Well, it's clearly stated that with the units I mentioned, you can take the second castle, and with good luck, even the third. Plus, with luck and other bonuses, you might even be able to take the maximum. But I can't seem to manage it properly, so I'm asking. I considered the option of taking the third castle in online play, but I decided against it because the opponent is strong, and I need to resolve everything in the second week and finish it in the third. Otherwise, I would fall even further behind, and instead of surrendering at 117, there would be a formal final at 142, for example.