I have had several colonies of those ants.
First colony had around 20 workers, never came out during daytime. I sold them.
Second colony had around 10 workers, managed to get them up to ~35 workers but they never came out at daylight, too so i gave them to a friend. At his place they lived well until 2 months later they stopped eating anything. He had all different food that they ate before and he placed that stuff right before the ytong. Then they died/starved.
Third colony i received at 10 workers but without any brood. I was pissed and i was allowed to send them back to antstore, they were so kind to send me a colonly with at leat 50 workers as a replacement. Unfortunately that colony does not have any brood neither. They were foraging the first week, now they sit in their nest all day long and only come out at night, too.
Maybe its my fault all the time but as i said, they got delivered without any eggs or larvae and you cant find any positive reports about those species in the boards so i guess they are really different and unpredictable.
Hyperlinks sind nur für registrierte Nutzer sichtbar here is one of my workers, you can see they are really big. In direct comparison to polyrhachis dives they
seem to be at least 2x the size of those.