The One probably knew about the Gems of Creation linked to infinite plains of elements. This is never explicitly stated, however. The power that these allow is no real treat to him, although it does facilitate the lesser gods' disobedience.
(The Wells of Creation are something completely different. That term applies to the passageways that lead from Erebus to the Netherworld.
Actually, it might only refer to the specific portal located on the Isle of Nemora, a most lush paradise which was transformed into The Dead Lands once the Well was closed. The similar Well located near the Illian and Ljosalfar border was instead referred to as the Well of Shadows. The Once elves entered the Netherworld with Laroth through the Well of Creation, and left it through the Well of Shadows. They actually stayed in that well, building the city of Barathrum in this liminal world.
These wells include Bradeline's Well, but it is not quite clear if this is another name for one of the two distinct wells I just mentioned or if it is distinct from both.
I think that Kael may have referred to the Wells collectively as the Wells of Creation, but I think he also said that there are 21 of them. It would not surprise me if there was one well of each precept, meant to draw those souls most local to each respective god into the netherworld.)
I believe I did once say that Esus ordered the Svartalfar to join Basium's assault on the Fane of the Lessers, but I believe I was mistakenly confusing the Lord of the Balors and The Black Tower scenarios with each other. Esus actually acted to convince the Svartalfar to venture into The Dead Lands and help Falamar defeat Tebryn Arbandi before he could complete his Armageddon rituals. Esus is very much opposed to ending the world, but that does not mean that he wishes to break the great machine of hell. The Fane of the Lessers was very useful for the practice of claiming souls which should not have been given to the evil gods. Esus might well hope that Hell becomes home to more souls that do not belong there, and that these spirits come very close to escaping their unjust fate. His own vault is used to trick those who rebel against the evil around them into thinking the have returned to life, so that his illusions can cause them to become disillusioned with virtue. The really wicked souls, for which his fellow evil gods have a good claim, are probably less likely to end up as demons in his service than are those who were more neutral in life and who make some attempts to redeem themselves. Those who are most devoted to Esus are not processed through the great machine at all, as are those devoted to other evil gods. Esus often likes to claim them and take them to his own vault before they actually die. He likes living servants more than demons, but does still find used for demons too.
The Elohim are generally one of the most pacifistic civilizations, but they will declare war on occasion. Queen Ethne the White has shown herself willing to declare war in order to protect more vulnerable neighbors, even when her own people were not immediately threatened.
Einion Logos, the head of the order of monks, is much more of a pacifist than is the queen. He agreed to sign a peace treaty even with the Infernals, and argued that they should abide by its terms even when most of his people were demanding a new declaration of war.
The Bannor tend to think of the Elohim as being too soft, too gentle, and too lenient. They are not huge fans of their culture, but they do recognize them as indisputably good. They are not close neighbors and do not have a huge amount of interactions, but they are more allies than enemies. In The Wages of Sin scenario, we see that the Bannor were unable to mobilize the bulk of their army to fight The Infernals in the distant land of Tempus Mor (since Capria had already departed for The Fane of the Lessers, and Auric Ulvin was on his way to raze their capital city), but they still did send some troops to serve as reinforcements under the Elohim.