...So in Garund there's a kind of animal called a kilifish, that lives in seasonal pools. And when the pools dry, the fish die. Every year the wet season comes, the rains fall, the fish hatch, they live, they lay their eggs, and when the dry season comes they asphyxiate in the air. In captivity, in a tank, kilifish can live for years and years, but in the wild - every one of them is born an orphan, and not a one of them dies old.
Of the Empyreal Lords, Korada would rather you not think about what's going to happen to the kilifish at the end of the wet season. And he'd give the same advice to the fish, if they needed it, which they don't, so in Korada's book the fish are doing pretty well, I think.
I don't know Cernunno and don't want to slander Him. I'll say that I think Gozreh is happy that kilifish exist, and Cernunno might be as well.
Arshea is living Their best life, and wants you to live Yours, but if in Their travels They came across a kilifish, Arshea would rescue it to an acquarium where it could live its allotted time, or maybe to a river-fed lake where it might be eaten but would live free. And Arshea would be happy, because whoever saves a single life, it's as if they'd saved the entire world.
Vildeis, though, Vildeis would seek the kilifish out, in their miserable shrinking lakes, and rescue the dying in those choking muddy puddles, as many as She could, She'd spirit them away to safety. And then She'd return, the next day, and she'd do it again, and again the day after that, and the year after that, and the year after that. This is why Vildeis wins the most morality points out of all the Empyreal Lords.
Ragathiel would drive to Garund with a cement mixer, um, with a portable hole full of cement mix, in the heat of the dry season, and fill every dusty hole that contained a fish's eggs and bones. This is why Ragathiel is the best Empyreal Lord.