Once a player has built a nanite factory, does it pay to continue to improve the robotic factory, or should the player concentrate on improving the nanite factory?

Xenon

The higher a robot factory is, the less of a time cut it gives. And it only works for buildings. Nanites work for ships and buildings, and cut the time in half every time. But they get killer in cost. I just get my robot to lvl 10, but i have seen some that are lvl 16. It all depends on what you want

I upgrade my Robot Factories to about 13 because it cuts down on the time it takes for Nanites to build

You don't happen to know the ratio which the time cut decreases each level of the robotics facility?

I calculated it awhile ago, but I don't remember it anymore. Same thing applies with Ship Yards as well.

So ideally just get robotics and shipyards to like 10-13 then just concentrate on nanites?

Pretty much.

Sweet, that'll save me trying to make the mistake of getting like level 20 robotics facilities lol.

shipyards are actually pretty useful to take higher, those extra 1 or 2 seconds can mean a whole lot of difference

Yea, i could see them be so. Especially in those situations when you annoy a few to many people with raids and they want a piece back lol.