If you are looking for a guide specifically for the "Part 3" section of this DLC, it typically covers the following mission segments:
After completing the main story, you can invest money to rebuild Sammy's Bar. Part 3 Walkthrough Highlights Mafia.III.Sign.of.the.Times.part03.rar
A new combat technique that allows for precise shooting during intense encounters. If you are looking for a guide specifically
Within the school, Lincoln encounters hallucinogenic smoke that can restrict his movement and weapon usage. You must use the black light to find specific symbols, such as the "mark of the blessed". Mafia.III.Sign.of.the.Times.part03.rar
After the school, the investigation often leads to the Harless Mansion and later a storage facility where the cult's drug operations and sacrificial areas are located. Technical Note on the .rar File