Philemon was a clever man.
For him, the ending where Ariel is king, is the most profitable one.
While he had pretended to gain favor with Darius so that Notos did not fall even if Ariel died, he had taken steps to ready a hand to be played for either situation's outcome.
Following that advice, refuge was to be taken far away in a foreign land.
And there she would gather her strength and bide her time.