So what do you think the Vasari Homeworld was like? I would think it would be either Ferrous or Volcanic from the Empire upgrades that they have for planets. Since the Ferrous planet upgrades have the least amount of genetic alteration with Nano-Bots, I would go with that. Also Vasari ships, especially the Voroastra, seem to be built like insect shell, which we be easier to find on an arid like planet than a lava planet.