I can see that a lot of the descriptions notes that adding more lombards adds to the trickle to speed up returns but isn’t explicit about how multiple interacts.
it does say so more explicitly in the wiki atleast.
so this is an oversight cause this was basically noticed pretty early when the civ came out.
as for this I will just post this reply from a while back but basically its unraidable 2k hp crate gatherer that also generates xp at the same time.
Fully loaded its about iirc 6 res per sec so only slightly less than a vil’s 8 res per sec
also since its a global pool you only need to keep track of 1 while the others work all the same
Tbh the only thing I would change is either an auto button or have ui buttons like how the livestock market have buttons for you to click to sell without having to click the market