Using pre colonized borders for the confederacy?

Borders are a colonial construct. Indigenous claimed territory was specific to the territory’s economic function and specific resources. The confederations’ granting of territorial use-rights may not necessarily take the shape of precolonial relations, but it’s fine to look at it as a blurry model of the future.

When you say “white domination is the settler majority system itself”. Does that mean that the land having a vast majority of the population being settlers + one man one vote is the problem? You intend to only have a vangard party rule that made of people that support land back, decolonization, and unionization of all industry?

Yes in the same way as “one person one vote” is necessarily not existing at this moment in AES countries as well, or in any theoretical ML state which would intentionally subjugate its vestigial Bourgeoisie and proletarianize them. Though most land in the US is not settled by Americans but reserved by the federal government for future extraction. Much of this will be immediately expropriated by the existing indigenous nations. Most homesteaded land works the same, it has basically been reserved under private ownership until the haute Bourgeoisie expropriates it and sometimes de-classes the settlers depending on the price. Beverly hills hillbillies being the successful image of that process for the petty bourgeois settler. Every town in America has a class of real estate agents who’s wealth came from selling their family’s stolen land, ala Primitive Accumulation. In simple terms just because your Bourgeoisie stole property doesn’t mean you’re the one entitled to its expropriation, the rightful owner is in the people it was stolen from.