Let's play a game: Save the Ancients!

[Cilia]

I think there are a few holes in your logic there.

Since you seem to be having trouble following the train of thought, let's go over things from the top.

The original question is "Is it possible to save the Ancients?" The short answer is no, because Amaurot sits on a foundation much more fragile than you think, and any disaster potent enough or social issue divisive enough threatens to send the house of cards tumbling down; and a single Ancient with enough knowledge / power and the motivation to do so can, by design or by accident. To say nothing of extraterrestrial occurrences that could easily disrupt their perfect little lives.

You can only save the Ancients if you're also able to save Amaurotine civilization, because they're near to terminally dependent on the easy and comfortable lifestyle it privileges them to. When faced with hardship and an uncertain future, their reaction was to retreat inward, rejecting change and the potential of the future for the familiarity and comfort of the past. The fatal mistake in that idea is that change is inevitable; it does not matter if they stop the Song of Oblivion, go back in time and stop Hermes from dispatching the Meteia, help his mental health, allow the Meteia the life experience necessary to be emotionally prepared for what's out there in the cosmos, etc. Change will come, whether we will it or not; the question is whether or not we have the resilience to deal with it, and clinging to the ignorant bliss of Amaurot would never allow humanity even the chance to actually develop that resilience.

So between the Ancients' capacity for destruction (intentional or otherwise), their lack of resilience thanks to their comfortable lifestyle, and the inevitability of change, you've got a house of cards trembling in the wind.

"Can we save the Ancients?" quickly morphs into "Can we save Amaurot?", and the answer to that question is a resounding no; not forever, at least. The Convocation cannot have a contingency for everything (re: Song of Oblivion), and if their easy lives are upset the Ancients retreat inward because they have no resilience. Would they be able to reach a consensus on whether or not to grant Midgardsormr refuge when he arrives? Be able to react quickly and effectively to Omega crashing down and tearing up the place looking for him? Etc etc. Cast the die enough times and you're going to get a critical fail, and then it all comes tumbling down.

If you want to be a little less ambitious and ask whether or not the Ancients could have been saved from the Song of Oblivion, the answer is actually yes; but, only if you go back in time and stop Hermes from sending the Meteia on their ill-fated sojourn across the cosmos. Get him some counseling, ideally from someone worldly (like Venat or Azem); get the Meteia the life experiences necessary to handle the despair that may await them out there (somehow - easier said than done in a world where pain and suffering are virtually nonexistent). Once the Meteia are out there, how in control of things Hermes is becomes extremely questionable, and detaining / unmaking the Meteion he kept with him on Etheirys does nothing - she's just one of dozens (if not hundreds) and stopping her will not stop her sisters (or their merged Endsinger form, for that matter).

Did I convey my ideas clearly? Are you gonna strawman me again? Only time will tell!