You may have to experiment with different base curves or even make your own one. I don't know much about the underlying theory but I lamented how I couldn't pus

You may have to experiment with different base curves or even make your own one. I don't know much about the underlying theory but I lamented how I couldn't push the shadows in Fujifilm files (halos like hell) and people suggested that I should make my own basecurve and that would help a lot. My new camera has an excellent base curve that hasn't needed any adjusting.