Is anyone else being reminded of The Survivor's Son (aka Crabhand) from The Great Ordeal, when reading this scene? (I didn't see anything mentioned in the thread - correct me if I'm wrong). After emerging from TTH in ruins of Ishual, Koringhus collects 100 stones, goes into the forest and kills 99 birds, because "he can't stop killing", with 1 stone per 1 bird. Later, under effects of the Qirri, he gives the 100th stone to his son, before taking his final leap. Later still, The Survivor's Son eludes C'nauir's companion skin spy, who looks like original Serwe, by striking her with 100th stone, while on the cliffs.
The parallels, or perhaps inversions, of Serwa & 100th missing Chorae to Koringhus's Son striking skin spy Serwe with his 100th stone are striking. I don't know what exactly to make of it. The Survivor said in TGO "That all of this has somehow already happened." This is clearly not a case of replaying things exactly the same, but it does remind me dualities concept found in mathematics/physics where two theories/formulas can be translated back and forth into each other, which makes calculations which are difficult in one - much easier in the other one. This feels like something along the same lines: the same event, just being given different interpretation/inverted in some ways. Also reminds me of those boxes, mentioned in appendix, which show horrible/demonic scenes from some perspectives, but good/heavenly scene from another.