That's boring.
The idea of a super man is boring. Superman is not, because naturally there's more to him than that.
Likewise, an Ishvara is more than a super-raksha. You could get that much (a super-fairy, that is) just by adding tons of XP until they were Essence 10 and loaded with Charms and Grace Artifacts, with an army of enslaved nobles.
No. If those super-raksha (the XP veterans) are the veteran heroic mortals of the Fair Folk, then Ishvara are the EXALTED of the Fair Folk.
Every Ishvara is unique, because each of them found, built and skyrocketed on a unique, universe-spanning Story.
Prince Balor convinced the universe that he was The One Who Would Destroy Creation. His narrative became so all-encompassing, so expansive, that he did the impossible -- he united the entire raksha species under his banner (ALL of those Essence 10 veterans became his bitches), turning them into an army that encircled Creation, ready to leap upon the opportunity to wipe it out entirely. Thus was the Balorian Crusade even possible, because simply letting down Creation's defenses would not have provoked such a unified, coherent and immediate response.
He also wrested an aspect of the Shinma themselves to use as a hunting beast -- Ishiika, the Grass-Cutting Scythe, embodiment of physical destruction. A lovecraftian Scorpion Monster so enormous that it personally could not attack any target smaller than one of Creation's
entire cardinal directions. But there was also the swarm of smaller bug-monstrosities that lived, fought, killed and died across its impossibly vast body, so that anyone approaching Ishiika would be fighting for their life long before reaching its surface.
Before Balor, Prince Laashe became The One Who Would Die And Be Reborn As The Sun Who Replaces The Sun.
When the Unconquered Sun killed his master, Laashe won his life through fast talking. As if that wasn't impressive enough, he even managed to extract an oath from the god that the Sun would not kill him! An oath the fairy went on to abuse, deliberately provoking the Sun to break his oath and kill him...
Which the fairy survived, avoiding the blow and faking his death. More, it was a calculated gambit to make the Sun forsake his own invincibility in the act of forsaking his word. Rather than waste the opening attempting to strike the Sun dead, Laashe instead turned himself into a curse that clung to the god's back, where he hid until the Sun returned to the sun to rest.
While the god slept, the fairy prince snuck away and found the heart of the sun. There, he threw himself into the Daystar's fiery core, where he absorbed its essence and completed his ascension.
The Sun God awoke, but the fairy had already fled to Creation, where he gulped down the souls of dozens of mortals. When the Unconquered Sun came to slay him, the fairy played on his Compassion -- the Sun could not kill him without sentencing those humans to death and oblivion.
Holding to his Compassion, the Sun forsook his Valor. Bereft of his invincible shield and irresistible spear, the Sun was overpowered by the solar Ishvara, who began to erect jade walls to imprison the god, and took up the Sun's own spear to end his life...
Except Laashe had spent so long obsessing about the Sun that he was blind-sided by the Moon. Having waited until it was obvious the Unconquered Sun was about to become Conquered, Luna stepped in and used the impossibility of the whole situation against Laashe.
She banished him to The Beyond, Oramus's domain and her birthplace; a level of existence outside of the Shinma. She told him, "You were so rare and amazing that
you didn't even exist." A lie no less real than his own Ishvara narrative.