The big challenge is to make money on low income, while going up into the sky in volume. For now, I am keeping up very well! It takes a lot of time, resources and planning. But the island has the first platform stage build! On the side I learn about the pirate flag mechanics. I learned very recently you can attack islands of an enemy with the pirate flag enabled. I had no idea! It saves so much time. Also, I try to get Silva back on an island in the NW, after he loses it. Also I try to keep the fleet of Alonso small. The island farming of items is a nice extra, also goes for all the different drops that happen. While in the background my warehouses fill for the next step up into the sky.
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