Bronks
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The same problem. The enemies are too strong. I capture one town, but lose a large part of my army in the process, and then strong heroes (~level 18) start attacking. I barely managed to deal with two of them, and now I have very few troops left, and there's also a hero from the second castle running around. There are still a couple of days left until the end of the week. I'll try again in the evening.