I have upgraded all the heroes, heroes'weapon ... to the Max without gemmes. Unless the samurai who is level 17. He has more life than ronin but he has not the miror armor... should I use my gemmes to upgrade the ronin's armor ? The shogun kill my farmers before they hit him... So they need to be upgraded with gemmes...…
I use a lot of assassins against them. They don't attack you when they are converted because they are running to the gate, and the other assassins kill them quickly. But you need a good gate level (3-4) to send enough assassins.