The thing I don’t quite understand about the Argentines is that supposedly a key part of their rise in North America is due to their ability to build super-colonies (actually, my father says there are two, and that the border is somewhere in San Diego or something where there are piles of ant corpses marking their constant warfare). The supercolonies arise because the queens from neighboring colonies are so genetically close that workers don’t recognize one another as rivals.

So naively, it seems to me a mitigation for the Argentines would be to import a large number of distinct queens, get them started, and then see if once they can no longer super-colony (a verb now) the natives have a better chance of competing.