For this achievement, you need to shoot the wheel in the Darosham temple located in the southern area of Okansakaar. This wheel is spinning behind a fire in the temple, and the actual diagram is located outside of the sunken temple to the West of this temple. You need to shoot it in this order: Fire, Zig-zag, Moutnain, Line. This is a bit confusing, but check out the video thumbnail or the video for the diagram. Hope the video helps!