I premixed my paint colours in seperate strings with a total of five values. It took me a couple of hours just to do from the jawline to the forehead but I'm happy with the results. I used several brushes of the same type, my main brush used here is a 1/8th Neef 988Taklon oval. For the lips and eyes and slight blending I used a 000 Neef 225 finest sable round. And for the major blending on her cheek and jaw I used a 4 Fracheville 200 Talkon. I'll add some pics of them at a later date.
Here's a closer look.