Yojimbo looks good but takes a card to unlock and is really expensive to train. Ordinary cavalry archer does great against artilleries and horses, keeping the flames safe. Consolate units auto-upgrade per se, making them a cheaper and better alternative to mercenaries. Dutch muskets form a solid frontline, ranged or melee. Economic buildings also do some good to the entire Japanese game structure, benefits in training gold-consuming combo and boosts the military performance a bit. Try this deck.