Do we know that the atrocities committed onboard the Ark outside of Earwa "count"? I think perhaps that the power to form topoi is a property Earwas possesses because it was the world the Inchoroi were searching for, much like how sorcery is likely a side effect of this as well. If that's true, then Golgotterath could not have begun conversion into a topos until after the fall.
Keep in mind also that Golgotterath was utterly empty for a number of millennia. That's plenty of time for places like Cil-Aujas to catch up with their lead.
I believe that Golgotterath is a powerful topos. More powerful than Mengedda or the Mop. However, I doubt it's anything as bad as Cil-Aujas. The primary reason? Because Cil-Aujas would be incredibly
dangerous to live in as a base. Especially for ones as damned as the likes of Aurang, Aurax, Mekeretrig, and Shauriatas. One Wight-of-the-Mountain scale event and they could lose everything. And I imagine events like that are frequent in places like Cil-Aujas. The Skin-Eaters weren't in there very long.
Now it is of course worth mentioning that many Sranc and Bashrag lived within Cil-Aujas and survived unscathed, and likely had for many years. However, remember, the Sranc and Bashrag are weapon races. Constructs of the Inchoroi. They have no souls. This means that things from Outside are
blind to them, just as the Gods are blind to the No-God. Ranking members of the Consult that possessed souls, like the Twins and Shauriatas, can claim no such protection. Hell would reach out and claim them quickly, attracted by their deep bruises.
The suffering of the slaves is an important precursor, but the slaughter and betrayal that accompanied the fall actually created the unrestricted breakdown.
I will add to this speculation that the suffering of the slaves in Cil-Aujas was a very new thing compared to the horrors of the Ark. Given that the Emwama failed to rise up against the Non-Men multiple times through history, we can infer that their general treatment for most of history by the Non-men was no more horrible than the later men of the Three Seas would treat their own slaves.
I'd argue that the extreme suffering of the slaves in Cil-Aujas came much later. We have never seen an Intact Non-man. I'd wager that the only difference between an Intact and an Erratic is predictability. The Intact have to keep their memories going too. They may well have been aware of the Erratic method of reinforcing memories by inflicting post traumatic stress disorder upon oneself. Perhaps the Non-men of Cil-Aujas feared their inevitable fate more than Non-men of other mansions, and that they turned to their slaves to preserve their memories-through inflicting horror upon those that stirred their memories. Perhaps every Cunuroi of any rank in Cil-Aujas had their own Elju, and picked slaves that they loved, and so punished, to remember said love. An entire mansion of almost-erratics.