On topic, while post can enhance it cannot create a sharp image. The sharpest image is one with correct exposure, focus, aperture, steady hand (tripod), etc.. Everything affects sharpness. An image is an infinite number of infinitesimal pinpoints of light all being placed where you tell the camera/lens to place them.
However and assuming the shot is "close enough", try your post routine with the sole purpose of sharpness. In other words, use each tool with an eye to how it affects the detail of the image.
However and assuming the shot is "close enough", try your post routine with the sole purpose of sharpness. In other words, use each tool with an eye to how it affects the detail of the image.