After some more thinking, here is my conclusion about how the units will work in the coming update for the HE:
Group 1, includes : Ranger, Spearmen, Pikemen, Silverine Guards, Archers, Silver Helms, Bolt Throwers
- A weak generic version, using faction colour, can be recruited in any region, including Ulthuan
- An heraldic version, using the colour of the provinces where they are recruited, can be recruited only in Ulthuan. They have heraldic shields when applicable.
Group 2, includes : Sea Guards, Axemen, Swordmasters, Halberdiers, Chariots, Shadow Warriors, Sisters, Phoenixes and Dragons.
- A weak generic version, using faction colour, can be recruited in any region, including Ulthuan
- A unique version can be recruited in any region of Ulthuan, from the generic building, but with a small cap. They can also be recruited from a landmark, and the landmark gives a larger bonus. They can't be recruited outside of Ulthuan.
For exemple:
- "Axemen" are generic White Lion Warriors. They can be recruited from Hunters level 3 anywhere in the World.
- White Lions warriors can also be recruited from Hunters level 3, from any region in Ulthuan. Each Hunter level 3 in Ulthuan will give +1 cap for them. Hunters outside of Ulthuan don't increase cap (but they increase cap of Axemen). The "Tor Achare landmark" will give +5 cap / level.
Increase the settlement in the province of origin, or the landmarks, will increase the cap.
This way, you can still recruit the HE elite units such as Swordmasters or White Lions in any Ulthuan region (it's a little to tedious to have to move your army to Chrace just to get White Lions). But if you don't control the landmark in their region of origin, you'd have a very small cap. You can also increase settlements in Chrace to increase the cap of White Lions, but it will have no effect on the cap of Caledor Dragon Princes for exemple.
Here is the list of unique units like this, with the required province
- White lions warriors: Chrace
- Swordmasters : Saphery
- Sisters of Avelorn : Avelorn
- Ellyrian Reavers : Ellyrion
- Dragon Princes: Caledor
- Phoenix Guard: Eataine
- Lothern Sea Guards: Eataine
- Cothique Sea Guars: Cothique
- Tiranoc / Ithilmar Chariots: Tiranoc
- White lions Chariots: Chrace
- Shadow Warriors : Nagarythe
- Phoenixes (fire and frost): Eataine
- Phoenix (arcane) : Saphery
- Dragons: Caledor
Group 3, includes : Lion packs, Great Eagle
- A weak generic version, using faction colour, can be recruited in any region, including Ulthuan
- A normal version, using faction colour, can be recruited only in Ulthuan
Group 4, includes : Unicorn Sisters, Pegasi Sisters, Griffon Riders, Maidens, Mistwalkers, Dryads/Treekin/Treeman
- Unique units which can ony be recruited via a landmark in a specific region, and in small number
- Griffon Riders: Chrace specific
- Mistwalkers: Yvresse Specific (unless Eltharion)
- Sisters/Maidens/Dryads/Treekin/Treeman : Avelorn Specific