So I accidentally became an oil baron.
It started as the most classic expedition - royal woodlands; humans, beavers and lizards; extra people, oil and wood as bonus. First cornerstone was the bonus to veggies, and one of the first blueprints was the small farm, and there was some fertile soil in the initial glade. Things were looking good.
Turns out the first few glades I opened had patches of fertile soil as well, and in the meantime I got another cornerstone for veggies, and unlocked the press for oil. I ran on a single woodcutter camp that was rarely kept fully staffed, because I needed to keep the hostility low - sacrificing oil and marrow doesn't lower hostility.
I wasn't using water, so all blightrot was from the prestige. Every year two people would leave because the queen wanted me to send ludicrous amounts of wood that I was just not producing. Every log was either turned into planks or coal. Additionally, in year 8, 8 people died because I was cursed by the blighted traveller that I had robbed.
I did produce some complex food, but I simply didn't get the workshops that produced luxury items that I needed. Couldn't make dye for scrolls, got no workshops that produced weapons or incense. My coat production wasn't that great either. Solution - buy stuff with oil.
The positive forest mystery doubled the rep gain from morale, so I had to overcome the high hostility with as much coddling as I could give my people. And so, traders left my settlements happy, with wagons full of oil, while my lizards were generating reputation like there's no tomorrow.