Self-sustained Arctic, no imports required

This is a full layout for the Arctic (3 islands + 4 gas plateaus) to produce everything required locally, without any import from the other regions. All needs are fulfilled except coffee. Only 3 mines are clipped so if you want to fully maximize gas production you'll have to adapt this setup. Once fully built, the region is pretty stable and produces 20t of gas (enough for 14 power plants + a bit of extra), 8t of Arctic reports for scholars, ~4t of feathers for Enbesa, ~4t of caribou meat for tourists, ~6t of bear fur for investors, ~12t of zinc and ~9t of copper for a total maintenance cost of 13 337$. Make sure you always export the gas otherwise the copper production would stop resulting in an oil lamp shortage in the region.

You can refer to the images to know which items to put in each arctic lodge. When there is a free slot in a residential area, you can add a radiator to further reduce the arctic flu chances, but the extra workforce is not required so this is entirely optional. All islands have both local and regional mail activated in the lifestyle needs except island 3 (population island) which has only regional mail. This way, all the local mail can be used to "overflow" all the other islands with regional mail without having to carefully tune the mail transfer rates in the trading route.

If you want to settle on more islands, you can delete some houses from the islands with extra population (starting with the one outside of the range of postal service to prevent reducing the arctic reports productions) and rebuild them on your new island. Make sure you keep the number of houses constant though, as it is important to keep at least an overall 3:1 ratio between explorer and technicans houses for the canned food production (islands with less than 100 explorers don't count as they don't consume pemmican, and technicians houses on islands with less than 300 technicians count as 2 explorer houses intead in this calculation as they don't consume canned food but consume twice as much pemmican).