Hi all,
I tried out this scenario, and I do not think it is winnable.
On Normal, there is only a single Rare Ore node on the entire map, and it is in the enemy base. It is a single bar yield, and by the time I took the base, Plymouth AI depleted it down to 90 ore per truck (with Rare Ore Extraction). Returning the truck to the smelter, gives (with Smelter Postprocessing) 100 total bars per load. The volcano on the map, when it erupts will cover the rare ore mine with lava, making it inaccessible. I had four smelters and about 15 cargo trucks working that 1-bar mine, and by the time the lava covered the mine, I had about 4,000 in storage and the Spaceport built, but no RLV or starship components built. It is a starship victory, so you need to launch the starship.
There are no magma vents, or alternative ore veins on the entire map. You get a two bar common vein for your base, and the enemy base had a one-bar common vein with their one-bar rare vein. As there was no other rare ore opportunities, seizing the base with just EMP, Railgun, and Laser Lynxes was extremely hard, and the enemy gets regular reinforcements to the south, that eventually turns into Panthers. Just after the lava destroyed the rare mine, a horde of 15 panthers arrived and slaughtered my 25 something Lynx defenders, and at that point I rage quitted.
I am not sure how you can win at this scenario. With no alternative veins, no magma vents, and no alternative to your two bar vein, I was resource starved for most of the game and couldn't take advantage of the geothermal vents for power or panther/tigers for assaulting the enemy base. I had to let my morale dwindle to near zero to be able to focus all resource production into Lynxes, as I couldn't afford to build an army and build impulse goods or fresh medical centers/residences for the colony.
I like the theme of being my back against the wall, with a tough fight ahead of me, but this is too hard and too stingy on resources. If anyone can edit the map to add in better resources, or at least a couple magma vents, that will help a lot.