Despite the availability of washes, I'm still a fan of using inks on my miniatures. In the picture, you can see the results of applying a goblin green basecoat to an ork boy's exposed flesh followed by the green ink. The results can be seen. The ink does a great job at getting in to the recesses and darkening the miniature. As I'm slowly using up my remaining citadel ink pots, I'm mixing up some of my own by diluting my darker colours with with equal parts of water (or less). After the inking layer, I'm still applying a highlight colour or two (or more), followed by a wash to bring everything together. This is because washes are excellent at blending lots of different tones in to a smooth transition that retains the highlights and lowlights very well. It'd take many layers of washes to achieve the same effect as inking (or moderately diluted darker colours), and so that is why I'm still using them to this day.