So, I'll be honest, I have no goddamn clue about what the tactic that's been mentioned but hasn't been acknowledged much is. Instead, I'll give an idea I had for a Wicked 40K setting. Initially, the setting seems outwardly grimderp. Manual slave labor loading macrocannons, Emps planned the Horus Heresy, and stuff like that. Then, you encounter a Minor Chaos God embodying all of Chaos' positive traits. This is baffling, because Eilrahc seems genuinely benevolent, despite being a Chaos anything in a Wicked version of 40K. Then the Emperor dies and the Empyreal Tyrant rises, with Vashtorr using the chaos, pun intended, to make his own play and become the Engine of Extinction, and she gets stronger, going from 5%(Tzeentch, Khorne, Nurgle, Slaanesh, Malice) of a Chaos God's strength, to 7%, and gaining abilities tied to the Tyrant and Engine, respectively something akin to my Supportstream Element and a general innovation buff. Sure, things are bad, but if she gets stronger with each Chaos God, then things shouldn't be too bad, right? Then Bel'a'kor and Drach'nyen'antwyr rise as Chaos Gods, pushing her to 9%, and granting her more synergies. Atlos rises, lord of those who would hang onto power at any cost, patron of both the despot and the rebel who rises and becomes a despot himself, bearing similarities to both the Tyrant and Engine, but subtly different. Here you begin to grow suspicious, even with Eilrahc having obtained enough bits of personality to become a full person. More and more Chaos Gods rise, including those of Law, as the Tyrant opened the door as Chaos God of Order. A grand total of 38 have arisen at this point, and you're honestly wondering if Procession counts how horrible the world is on arrival or by the time you die, and stay your hand mostly because you suspect it's like Indenture.
Eilrahc has been a constant ally and very frequent companion, and represents the other reason you haven't elected to simply give up and try again with the next world of your Procession. You'd go so far as to call her a friend. However, the Word Bearers and Lorgar have arrived... to venerate her. You see, the ultimate purpose of this reality, according to them, is for the Warp to reflect, magnify, and refine various concepts. The first is done throughout the Warp, the second by the Chaos Gods, and the last... by Eilrahc. Lorgar even notes that it was, ironically, an Old Terran religion, that he only learned much of after convincing his father to allow Lorgar to study his old records in return for the Word Bearers' expertise on spreading the faith to bring the Tyrant's word to xenos races, that brought it to his attention. Eilrahc's True Name was the same as Lucifer's Daughter, Engamelrahc. Fitting for the Daughter of the Primordial Creator, the Warp.
Each Chaos God adds a new concept to the mixture Eilrahc represents, just as each Chaos God further destabilizes reality. Eilrahc will rise as a new singularity to create a new, brighter universe. Of course, the current reality will dissolve, like an egg being cracked open from the inside, but considering the straits the universe is in, is that really a bad thing? Lorgar even offers to let you help with the following Chaos Gods. With so many already on the table, more are going to be on the way no matter what, and when they hit 100 and Eilrahc hits the might of a full Chaos God existing in the Materium despite the usual issues with that, reality will dissolve no matter what you do. It says a lot that, despite Eilrahc being distraught over the news that she was the nascent end of this reality and all she knew, something she understood intuitively as the truth now that it had been spelled out, you seriously considered if Lorgar might have a point, even if you couldn't be sure Eilrahc would actually still exist to make that brighter universe Lorgar promised.