Hellpoint,
After doing a lot of axion grinding in a world polarized to level 2 (the more polarized a world is, the (lot) more axion you'll get from defeating enemies, but everything become also much harder and resilient to staggering), i recessed the world back to level 1 and went to fight the 2nd (there's no order, it's just the 2nd on the order i decided to go for my kill list) cosmic horror deity of the game, "Undisturbed Defas Nemundis".
For this i had my Archon Spear that has been amazing constantly since i crafted it after getting the blueprint from an Archon Knight miniboss(+ the conductor i attached to it was after my grinding at a good level so its damage was even higher), and because i had read how good this weapon was against very large enemies : the Channeler of Hell that i had grinded completely to enable its last power that can summon several pillar of fire in a line, making some kind of firewall that deals constant fire damage to an enemy.
And large enemies are then hurt by a lot of those pillars at the same time.
Additionally Nemundis does not move much, he's meditating and only sometime float around (his attacks are done by his spirit/soul that comes out of his body) and barely moving large enemies are going to get hurt a -very- lot by pillars.
So this way it was surprisingly very easy (good i didn't forgot to recess the world, as i guess in a polarized one it would have been very different
), ran around to avoid the nasty strikes and death rays but with Nemundis burning and my Archon spear poking hard it was a victory for my character.