Resources are not random. They have static spawn locations.
Nodes are connected in groups of 4 throughout the zone. If you figure out which 4 are connected, you can put bots at the 4 locations and set them to mine them in sequence and they will re-spawn as soon as the 4th one is mined. Thus you create an endless farm loop.
this one theory need confirmation first, but for me its looks like truth
need investigate more, guys
appreciating for any help