The White Drake

That seems a stretch, given the highly locational nature of all Sel magic, and seeing as how the Investiture is in the Cognitive, where distance does matter, as opposed to the Spiritual where it does not. If they could link in such a way, they'd have no need to drink Dor away from Sel, and Secret History also shows us they have a power cord for their base in the Cognitive near Scadrial, leading off presumably towards Sel. What makes you think such is the case?

Yes. Can you connect that to the discussion? She absorbed the Dor, that doesn't mean it was all expended in just the stamp. The fundamental laws of the Cosmere tell us power doesn't come from nowhere. You can't use more Investiture than you have. On Sel, the Aons are powered by all the Investiture in the Cognitive Realm. Do you mean to propose that, by use of a single jar of Dor, an Elantrian can spam an unlimited amount of Aons forever? Good point, but I get the feeling it won't be so easy. After all, the Ghostbloods had access to everything you describe, and still took pains to get Light and purified Dor. Even in the future, unkeyed Light is valuable. Just like with getting compounding via hemalurgy, making an Investiture generator is likely to be harder than it at first appears.

We observe in Mistborn: Secret History that Elantrians need a constant supply of it, like water, just to maintain themselves. Furthermore, it's not an infinite resource- it gets expended. Every Aon drawn will require some. The more you want to stack Aons on your soldiers, the fewer of those soldiers you'll be able to field.

Yes… and? My point is you need that supply of portable Dor, so I’m not sure what you’re getting at here.

Rockbuds seem pretty common, but chulls are a domesticated species, so I don't think wild herds will be all that populous.

Anywhere but on Sel, you need to manually carry a massive amount of Investiture. Doesn't seem practical if you want to supply an army.

They're so location-limited though. Nigh unbeatable, but you couldn't send them anywhere else. Any form of Investiture from anywhere is on the table, including forms of power, Fused, and the usual ways of obtaining Light.

Presume that you have access to the entirety of the Cosmere and it's magics, as of the time of the second Era of Mistborn, and want to build the best troop(s) for a military possible. Take all factors into account, including the difficultly of creating each unit. What combinations of the magics do you select for your ideal force? What is the basis behind your selection?

It may not be the case that they are different. Simply that once a gemstone grows noticeably dim, it's already almost done for.

If they can sustain themselves on ash, they can survive on sand or stone just fine Hard to get a swallowable handful of stone, and I doubt there’s enough sand to support an army. Trees though…

Only the pantheon islands have the hyperlethal environment. By and large the planet is called out as seafaring. I didn't think of koloss failing to catch Rosharan grass, but it is amusing. A Phantom should be able to make around 700 miles in a day (discounting terrain). With an estimated radius of 100 miles (though I can't find a citation for that figure), circumference should be a little over 600. The math checks out. Terrain will slow them but they can also just not go the longest way around the planet. Wasn't there a mention that at one point a koloss warlord invaded the Basin? When Marasi is seeing the weapons the constables have prepared in Shadows of Self. Regardless of this, the deep sea has unknown terrain, zero visibility, easy to get lost, no ability to send commanders in with them, and so forth. Lots of unknowns. I wouldn't want to send my near-invulnerable crazy expensive Invested units down there.

I see. I thought that was what was happening when she admitted she caused the Desolation

The platespren we see there aren't windspren, so that's his Skybreaker armor, which he'll presumably obtain later with Aux. Shallan reached Fifth Ideal I thought. Sanderson is saving seeing what it does for later, but later will be a decade from now.

He does state he would have used Dalianar's death to unify and galvanize the Alethi as I recall. Hard to stop a battle, particularly one so pitched. It might be so but I wouldn't bet on it. Thing is, without hosts (I doubt slaveforms will be ideal, it needs the Parsh to open themselves up to the Fused), and without an Everstorm (thus needing the unknown 'old' method), how do they get themselves bodies? It's not an insurmountable obstacle, but it gives them a hard starting period until they can pull the Everstorm over.

My understanding is the hollow spaces in the bones is what would make them be crushed.