Is there a way for us to increase that passive regeneration more permanently? Will having our subjects like us more, increasing their general martial skill & fitness, or having more unemployed people with fewer prospects increase the replenishment rate? Maybe we could create a separate youth organization staffed by veterans and trainers to give any male youth below 18 years old the chance to participate in light training exercises and games (mixed in with a healthy amount of pro-empire & pro-Sigmar propaganda) in exchange for hot meals, shelter, and a head start once they join the military. This organization would mostly target street urchins and other kids with little prospect in life who'd normally turn into gangsters to instead be funneled into the military or be groomed as potential agents for our intelligence organizations. Think of it as something akin to the "League of Karl Franz" but instead of partying like a bunch of rich kids, it's an indoctrination center/training camp for future soldiers/non-knight elite troops of the empire.