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This system is absurd because I can give peasants a +10 bonus since they pay a small amount each day, while the Swamp gets a +20 bonus just because it has a level 3 guild, and the hero has an excess of mana. Of course, I'm exaggerating, but it's clear that you can also give bonuses for minor things, and the Rampart will be far ahead in terms of its bonuses. Although, I won't refute the opinion that the Rampart is indeed a good castle.