In the sky of The Elder Scrolls 5, players can make various items through different synthetic recipes and earn a lot of gold coins in the game. The following are some of the most profitable formula synthesis strategies: 1. Main forging formula: By making the main equipment, you can earn a lot of gold coins by selling these items. It takes a lot of materials to synthesize a set of equipment, including ebony, hard glue, keel and so on. 2. Precious drug formula: collect different herbs and chemical components to make precious drugs. Among them, the most profitable recipes include earthquake grass and giant toe grass, both of which can be found in the game. 3. Magic equipment formula: Make some magic equipment and sell it to other players. The most profitable formulas include blood-sucking wands, frost queen staves and so on. 4. Precious gemstone formula: By collecting various gemstones and minerals, some precious gemstones, such as diamonds and sapphires, can be made. These gems can be used to make precious equipment in the game. 5. Formula of black dragon equipment: By defeating the black dragon in the game, players can get dragon materials such as Long Lin and keel. These materials can be used to make black dragon equipment, which is very powerful and valuable. In short, there are many synthetic recipes that can be used to earn gold coins in the sky of The Elder Scrolls 5, but making these items requires players to invest a lot of time and energy. Therefore, players need to carefully choose the formula that suits them, and improve their synthesis ability through continuous trial and practice.