Here are my initial thoughts:

- Residential Arcology (as regular Ecu district)

- Solar Arcology (4 farmer, 4 technician; 10 housing): This high-flying district employs vast solar collectors in service of both horticulture and power generation.

- Reclamation Arcology (5 miner or equivalent, 1 chemist, 1 gas refiner, 1 translucer; 10 housing): This low-flying district scrapes the surface of the old world, extracting usable material from millennia of waste.

- Industrial Arcology (4 artisans, 4 metallurgists; 10 housing); use the Ring World description

- Leisure Arcology (4 entertainers, 4 culture workers); as regular Ecu district

Planetary Diversity has a Eco-Ecu sub mod which features a green ecumenopolis, might wanna take a look at that for inspiration

I would not add miners to arcologies, kind of does not fit the theme imo
and since the districts usually cost rare recources the reclamation arcology would be incredible powerful (not to mention that I find it hard to believe that elves produce that much trash in the first place :P)


It is hard to say what to use as a substitude though, I was considering something with science and entertainer but I suppose science is very strong on it's own anyway without getting an additional boost

I'm not super fond of the PD Eco-Arcology, since it's effectively a duplicate of the Gigastructures Planetary CPU (research + admin cap), and since the PD Eco-Arcology has no "ecology" -- no farming, no energy generation, etc.