I can give some pointers for a couple of your comments:
"-> I didn't mine the obelisk completely. Stuck on phase 4, where your water decreases ultra fast."
That's definitely the toughest stage, but it should only take 2/3 loops at worst. Try setting up the Water Generator inside Laurion. Mine until your Water runs out (or all Water sources are on cooldown), then go out, do some other things and restock.
"-> Like, you have a huge evacuation from Laurion to Santorini."
I think the evacuation was in the other direction, Santorini -> Laurion. (It's Santorini they were concerned would blow up.)
"-> If the administrator of a location knew they were evacuating to another facility, why didn't they take their protein bars with them, for such an emergency?"
I mean, 5 Protein Bars are worth a lot to someone stuck in a time loop. They won't stretch very far feeding dozens of evacuees.
"B) The optimal route to Santorini, seems like install metal plates (for mining rotors), install generator, travel tunnel to Laurion to pick up the supplies (ie 2 fuel cells), drive through tunnel back to Talos, then drive to dam->santorini. We need those fuel cells to power the generator, once we install the mining rotors."
You can go straight there from Talos. There are more fuel cells at the Quarry area in Santorini. (You may also be having trouble with this because you haven't completed mining the Laurion artifact.)