Time for the final update.....
I believe I found the reason for why the nigrocincta brood keep failing, that is because the colony has not been receiving enough water which caused the larvae to die. I figured it out when I accidentally spilled some water into the sand in the outworld and they quickly moved their brood into the wet patches. The hydration system of this nest loses water a lot quicker than the other 2 ASA nests I have so the amount of water typically used for those is not enough. Now they have a pile of eggs and some small larvae which I am confident will do well now that I have increased the amount and frequency of hydration.
The Rhytidoponera Metallica are yet continuing to expand their tunnels, every few day they accept a few sizeable mealworm chunks. Safe to say these guys are the most prolific of my colonies, I expect to have to add more dirt to their setup when i come back. The springtail population is also booming and providing valuable cleaning and food services.
The forficata are growing at their typical glacial pace but haven't had any brood deaths so there's no reason for concern. Still at 3 workers, 1 mature larvae and a pile of eggs.
The camponotus aeneopilosus have 4 cocoons which I predict will hatch in another week or 2, they also have a good number of both large and small larvae. The brood outnumbers the workers so a population boom is iminent.
