@킨제유만 I don't play hiveminds that would keep aliens around for long but I don't think there should be too much trouble if you can keep them alive. But thanks for mentioning it, seems I didn't add the hivemind cyborg ascensions to the list.
As for Gigastructures, I don't know what would prevent you from using both. This mod doesn't change anything on the base files.
If you notice anything wrong with it though, feel free to mention it.

And is this also possible in 'Gigastructures mod'?

Is this even possible with a ‘hive mind’?

Good idea, changed it.

What. Did. I. Just. Read?

Anyway... "not affected" is not "Happiest in the universe".

"Not affected" is 50 for most intents and purposes, not a 100.

I'd suggest the angle of "forgetting all their trouble" or something similar. It sounds a lot like happiness but actually isn't it, which hits the nail on the head with nerve stapled and I believe would be a good thematic fit to what I think you were going for in that passage.