Carriage-Escort Machine Guns, Swarms of Armored Silver-Sword Knights, and the Mobile Gunboat Concept

"We can't fight the vampires through a series of small battles. We need to take the initiative, force a decisive battle, and concentrate our strength so they can't split up and wage guerrilla warfare."

"Besides Ria, we actually have two other Saintesses. They can be useful, too."

"My eldest brother back home has some connections to Van Helsing. We can bring him in as well."

"We need to concentrate our top fighters and hunt down the enemy's Sixth Rank and above."

"As for the rest, I have new weapons that can deal with them."

"We'll increase the caliber of our rifles. If their regeneration is that strong, we'll just blow their entire torsos apart with one shot."

"An 8-millimeter round is normally effective against any living creature. I never expected to face vampires, though, so now we'll have to use a larger caliber."

"For example, we could mount 20-millimeter machine guns on carriages for mobility. The other soldiers can focus on using machine guns, too."

"Ordinary soldiers' guns can be upgraded to 12-millimeter caliber, with non-supernatural troops serving in a supporting role."

"At the same time, it seems we need to consider whether gunboats are necessary. Artillery is too slow to move on land. My guns have a long range, so we could design gunboats that can fire from ten kilometers away without needing to approach the enemy."

"The Kingdom of Ivrea's tactics do have their merits."

"As for Holy Water, since our supply is limited, why not turn it into a spray?"

"And when they unleash that sea of blood, the blood is outside their bodies, so it won't flow around too much. Holy Water won't work because it'll react immediately and alert them. So why not use Holy Water aerosol bombs to expand the area it can purify?"