Even if you can make it to Santorini from Talos without stopping at Laurion, you shouldn't anyways. Since Santorini is on a fixed timer, and you can only get so much done in one loop anyways, stopping at Laurion and performing a handful of tasks will actually save you time in the long run once you get serious with Astrape, even if the Santorini portion will take you an extra couple loops because of it. Astrape is unforgiving in its early attempts, so getting the time of gathering resources and fiddling with systems shaved down during the Santorini portion will save you tons in the long run. Trust me...