Primal, Apocalypse and Guardians don’t have any bonus like the other kingdoms. EDIT: bonus coming from the power level (ie stars), like gold or the stats bonus.
And so, it’s difficult to trait their troops because in terms of passive boost, it’s meaningless…
Why? Can they have their own bonus (because only 4/6 troops)?
Because they aren’t really “kingdoms”. Just troop classifications. Like, there isn’t a specific place on the map where the four horsemen would gather. Or the imps, especially because there is only ever one out at a time. Guardians though, could be part of some sort of Guild Hall location on the map if they wanted to add it
There are not kingdoms because devs decided it. Do you really think that the 4 Horsemen don’t take a beer at home?
Yes it seems imps are unique but they can also have a home… Imp-land.
It can be portals going to other plans (like in Planescape) or whatever. My point was more about getting some passive bonus (stats/gold) when we trait these troops.