…and then I realised that there was still one small worm I did not kill, and there is a 8m coal patch in the corner of his territory. Hooray!

Am using the big ones, of course.Do you mean the productivity modules for them? The issue is that i have only 500k of coal to start with (

Vulcanus is good, for sure. One question: is it just the gods of random being nasty, or there is always not enough coal there? Killed all the small worms around, and a small patch of coal i had at the starter location is the only one. Can import it of course, but that is not convenient.