I think that the best way to win this game with any character is that you go to your capitol, then you take the best weapon there and then you do lots of rogue quests until you can upgrade whatever you need for your weapon. Once you can use your weapon, you can go and attack any city except for the really big ones and the capitols cuz you can't beat them because you probably will only have crappy soldiers. And to defeat Nagoya, you should get demolishers, or elite snipers or the great hero's to defeat the shogun ghosts.
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