One thing I find myself taking pride in, is the ants using the nests exactly as I had designed intended/imagined them. The chambers and passages are not done generically /samey, but with specific use intent imagined for them. This has been an evolving process as I watch their use and make plans based on that when expanding. They will just make due as best they can with what you give them. But what they have to work with has observable influences on their behaviors. You wouldn’t know they did all this unless they could show you.
here's the setup overall:
Some chambers are where I imagined brood care happens most, and other chambers where brood warming happens. Late stage brood are no longer feeding as they pupate, and benefit from heat most during this state. They are kept separate from the active feeding brood who are more commonly kept in slightly cooler and more humid areas.
Along the bottom are the towers where some feeding brood may be found, and the pupae pile will be sometimes.
While along the top are the hot chambers where pupae are warmed, and seeds used to be stored. The red circles are where the pupae pile is currently and the hot spot they are shuffled between.
The green circle shows their "staging" area. Whenever there is fresh food to forage, most of it is dumped here by the ants bringing it back into the nest, and moved deeper into the nest by other ants over time.
This big first nest tends to have the lowest population density, though can get very busy during foraging. And all the ants that hangout in this nest but don't do brood care, are the ones who will aggressively rush out of the nest to get all chompy stingy on fools if there are any disturbances.
The first nest i made, planned as a feeding brood care place it remains possibly the most popular nest by average population, they really like to pack in there.
The next brood care nest was also a double chamber heart towers one. Hearts are cool, and the ants seem to think so too, this is the next most popular place to be in the nest complex. Also where the queen is found most often thee days. though she does move a round a little and is found in most of the "lower" nest areas at some point. She avoids the "top" nest except when i overly disturb the "lower" ones for some reason.
The most recent nest is my big pride one where i planned for a better seed larder (less hot, less humid), and they used it, this is where all seeds are longer term stored now. The old larder areas is where fruit goes to dry.
And the new brood care chamber got a whole lot more usable floor space than the previous ones. Because they like to keep a "working" pile of seeds in a more humid area to help them be easier to open. They tried to keep some in the old tower chambers but those had so little floor space and it seemed clear it wasn't an optimal space layout for certain needs of sharing the humid chamber space between brood and some seeds they want to loosen up.
And it is exactly what they do wiht it, brood on the tower, small seed pile being worked off to the side.