Hussie did mention that if Sollux had godtiered while both dreamselves were alive that they would both ascend (though, he also said that they would kill each other infinitely), so maybe they could have their quest bed and sacrificial slab split down the middle?

No, no see that’s where there’s a major difference happens, both Solluxes would’ve ascended… Because they’re both the same person, with a single Main Body.

In the case of the Conjoined, they are TWO different people, meaning their CLASSPECT is going to be different. The issue isn’t that there’s multiple Dreamselves- The issue is that unless you could carry their corpse to BOTH Quest Beds in the time it takes for the Dreamself to die, only one of the two would be able to Ascend. Unless you have some means of teleporting, it’d mean one has to die, or one has to be smooch-awakened.

And even with teleportation, I’m not sure if the time it takes to God Tier is the same time it’d take for a Dreamself to die? For all we know, it would be better for them to be smooched and each Dreamself to go to their Quest Slab.