Sustainable development

Before you begin building a furnace or embassy, ​​take advantage of overtime at the boss's house. While building another furnace, use the second construction round and build all buildings up to the furnace's current level. The first buildings you should uplift after furnace's upgrade are the embassy and the building that will be needed to begin building the next furnace level. For rapid and efficient development, it's best to always have the furnace or embassy under construction, and to build the remaining buildings using the second construction round.