So, here's a few proposals:
First, the best combination for low upkeep mass deployment we can likely manage at the moment.
I really
don't recommend doing this as our first prototype, though - it seems likely to perform notably worse than "standard" waystones in a number of areas, which wouldn't be great for project momentum and getting people excited, and it takes no real political considerations into account.
[ ] Plan Mass Deployment Focus
-[ ] [CAPSTONE] Runic Inductor //lowest complexity and cost, we have access to a huge number of pseudo-runesmiths in Vlag
-[ ] [RUNE] Carved //negligible cost, trivial complexity, universal availability
-[ ] [STORAGE] Cheap Material //low cost, trivial complexity, universal availability
-[ ] [FOUNDATION] Grey Lord //modest complexity, but can be done by any wind-based wizard - all of the colleges, any of the elves, and the Damsels can all produce this
-[ ] [TRANSMISSION] Leyline //trivial cost, simply requires language knowledge
The main issue here is that a) this seems likely to be kind of bad at it's job even if it functions, and b) even with a cheap material, there's a risk of people digging up under the waystone to get at the goodies. The dream would be for the Reverse-Engineered Storage to eventually become inexpensive and simple enough to compete with a cheap material storage medium, but that would take quite a while, and would somehow be even worse politically when it comes to a first prototype - we'd have something worse in most ways to the standard waystones while also being near-impossible to actually construct at scale.
We can, however, go even cheaper if we remove the "low upkeep" part of the requirement.
[ ] Plan Just Build A Billion Of The Things
-[ ] [CAPSTONE] Runic Inductor
-[ ] [RUNE] Carved
-[ ] [STORAGE] None
-[ ] [FOUNDATION] Clockwork
-[ ] [TRANSMISSION] Riverine (Hedgewise)
It doesn't matter if 99% of these will fail within the decade, if you can use that decade to put up more permament and enduring waystones while the Dhar gets flushed.
And now for my actual suggestion:
[ ] Plan Better Than The Golden Age
-[ ] [CAPSTONE] Runic Inductor //there are a lot more runesmiths out there than there are high magic users
-[ ] [RUNE] Dwarven //since we're involving Vlag anyway, going for the extra touch isn't that much more complexity for more performance. also increases Karaz-Ankor buy-in.
-[ ] [STORAGE] Reverse-engineered //means house tindomiel has a reason to get involved at the start, and starts the ball rolling on figuring this out for mass deployment later
-[ ] [FOUNDATION] Grey Lord //gives the grey lords credit for their work, and is scalable to any casting human nation
-[ ] [TRANSMISSION] Both (Riverine: Jade) //gives the druids buy-in, and makes this a clear step-up from existing waystones
None of this is the easiest or cheapest, but this should be close to the best performance we can get.
Laurelorn, the Karaz Ankor, the Druids, and Ulthuan all get significant credit in this design, and requiring eleven archmages (at least to start, until the reverse-engineered storage gets untangled) makes the politics of giving a Laurelorn House right of first refusal significantly more palatable. This directly *upgrades* upon the existing waystones in important ways, which should help with the politics, and once the costs of the reverse-engineered storage hopefully come down, this shouldn't be unacceptably difficult or expensive to build, given that we'd only need this variety of waystone for the key interlinks where we want to transition from leyline to river or back. (Note that Damsels also have access to Jade Magic, so that's a whole extra magical tradition that can help with rolling these out if we get buy-in from them.)
With this sort of success under our belts, it becomes a lot more palatable to go for something like the "Mass Deployment Focus" afterwards.