I think we can go one step further w.r.t. the idea of "subsuming". When the Dûnsult talk about this, their phrasing is interesting; they do not say "We subsumed the Consult." or "We subsumed the Dûnyain." Instead they say just "We subsumed." I think the idea is that an uncareful reader will see "We [, the Dûnyain,] subsumed [the Consult]." My impression was that it should be read as "We [, the Consult and the Dûnyain,] subsumed [each other]."