"The Waystone network in Sylvania is in better shape than you might think," Markgraf Nyklaus says, unrolling half a dozen maps showing different corners of Sylvania and weighing down the corners with an assortment of weaponry he had concealed on his person. "The Von Carsteins infamously saw humans as cattle, but morality aside, that meant they had a vested interest in keeping them alive. So they kept the network in working order near population centers, and used something called 'balefire' to create wellsprings of Dhar where and when required instead of just having a constant sky-high level of corruption. There seems to have been something of a self-balancing mechanism to it - the less forward-thinking Vampires would be less prone to caring about long-term wellbeing of the human population, but they'd also be the ones that would want all of the Necromancers under them focused on conquest and expansion, so they didn't want to dedicate Necromancers to having undead do the mining and smelting and treefelling and blacksmithing that would arm and armour their armies."
You suppose that makes sense. Despite Sylvania's reputation, the continued existence of a human population within it that is sane enough to function puts a limit on how bad the taint could be. "It seems to already be concentrated along the rivers," you observe.
He nods. "That's where the people are, because most of the rest of Sylvania is either hills or forest. But there's opportunities for your riverbound Waystones if you look for them - upriver of Drakenhof, the former site of Drakenhof Castle, is pretty severely tainted, as is the upper half of the Eisig, where Vanhaldenschlosse was. There's also economic opportunities in the east if the woods there can be tamed and some farmland carved out of them, which the Waystones would make easier. On top of the direct benefits of more acreage to tax, if a few baronies can be carved out, that's some blank slate territories that can be populated with people that don't have thousands of years of Vampires on their necks."
It seems the Markgraf has been keeping an eye on your exploits. You let a raised eyebrow be your only comment on the matter. "Very good. The model of Waystone we've developed requires contributions from a Runesmith and a High Wizard. For Stirland, the most viable source of High Magic would be the Eonir, either from their magically-inclined Major Houses, or from the Grey Lords."