In any case, the Waystone you design today will hopefully be dotting the landscape of the Old World for centuries to come.
In my eyes, the question is "do we make the cheap one now and the complex one later, or the complex one now and the cheap one later?". Which ever one we do first will be seen as the "default" waystone, and later ones will be seen as iterations of it—so what do we want to prioritise?
Pros and cons for both approaches.
Cheap Now (Riverine):
[ ] [CAPSTONE] Runic Inductor
[ ] [RUNE] Carved
[ ] [STORAGE] None
[ ] [FOUNDATION] Collegiate
[ ] [TRANSMISSION] Riverine (Hedgewise)
Easy to make and deploy, we can start immediately. Can be deployed in areas with rivers but no waystones, like Sylvania or Troll Country. If the project ends or Mathilde dies or whatever, then the rest of the project members can simply copy-paste it across the continent cheaply. Due to the river leyline, no storage component is needed.
Downsides is that it requires upkeep, and the Runic Inductor is unstable and makes Dhar. Requires Hedgewise, Lightwizards, and a Runesmith—so potential bottlenecking due to a lack of speclists. The Light Wizards would also be messing with Dhar, which is politically inconvenient.
Cheap Now (Leyline):
[ ] [CAPSTONE] Runic Inductor
[ ] [RUNE] Carved
[ ] [STORAGE] [Cheap] Material
[ ] [FOUNDATION] Collegiate
[ ] [TRANSMISSION] Leyline
Same as above, but with no upkeep or Hedgewise involvement. May have difficulty being deployed in Sylvania etc., and has a slightly increased cost due to the storage component. Going for cheap materials is... probably not a good idea, they are going to have to withstand a lot of energy being pumped into them over a very long period of time.
Complex now:
[ ] [CAPSTONE] Stone Flower
[ ] [RUNE] Dwarven
[ ] [STORAGE] Reverse-engineered
[ ] [FOUNDATION] Grey Lord
[ ] [TRANSMISSION] Both (Jade)
Able to cover multiple uses (both transmission methods), more durable, and an equal or outright superior product to the original. Getting started early on the Reverse-Engineered storage mechanism would mean we simplify it faster—this waystone gets easier to make the more we make of them.
Downsides is the expense and the possibility of being bottlenecked by a lack of skilled craftsmen—which is the exact problem Eltharion has right now, and why he came to the Empire in the first place. It requires Runesmiths, Jade Wizards, and High Magic to construct.
Plan Something in-between?
Plan Middle of the Road
[ ] [CAPSTONE] Collegiate Fascis
[ ] [RUNE] Wizard
[ ] [STORAGE] [Moderate] Enchanted
[ ] [FOUNDATION] Grey Lord
[ ] [TRANSMISSION] Both (Jade)
A mid-difficulty waystone that draws exclusively on Wind Magic—every component can be made by a human or elven wizard. This definitely favours the Colleges and House Tindomiel. Cost and Complexity is middling, but it's perhaps not using the strongest option in each category.
Something to consider for the capstone is which method will have the biggest bottleneck—the moderately complicated Collegiate Fascis, which requires 8 different enchanters, or the High Magic Stone Flower, which needs a rare and valuable High Mage to make? I'm honestly unsure on this point. It can probably be knocked down to just using leyline transmission, but I don't see the point when we're making sacrifices on the rune and the storage mechanism anyway.
Political Victory
[ ] [CAPSTONE] Stone Flower
[ ] [RUNE] Dwarven
[ ] [STORAGE] Reverse-engineered
[ ] [FOUNDATION] Grey Lord
[ ] [TRANSMISSION] Both (Hedgewise)
This one pulls the best components from each faction that contributed, forcing political unity. Requires High Magic, a Runesmith, and a Hedgewise, as well as normal Wind users to build. Has an upkeep, but isn't actually that hard to deploy, outside of the storage mechanism.
Khazukan Kazakit-ha!
[ ] [CAPSTONE] Runic Inductor
[ ] [RUNE] Dwarven
[ ] [STORAGE] [Expensive] Runed
[ ] [FOUNDATION] Clockwork
[ ] [TRANSMISSION] Leyline
Do I need to explain this one? the only part the dwarves can't replicate is the leyline—and we have the option to research a physical leyline in the future, so that can be substituted out eventually.