OK, here is the (hopefully) final version.
I reposed the girl again. I refined the mesh as well, since there were some bad polygons.
I changed the tint of the skirt and added some ripples around the feet.
I rendered the whole image with slightly better settings (I increased AA from 9 to 12), which had the effect, that the drool strands are less visible, since these are very thin meshes.
Within TG I used the default contrast and gamma settings, which were a bit different in previous versions. Additionally I made the image a tad brighter in postwork.
There's still a bit of grain in the image. I used Max paths per sample of 64 (Architecture), and in the robust adaptive sampler I used a first sampling level of 1/16 and a pixel noise threshold of 0.02.
Rendertime for 3.5k was 19 hours and fifty minutes.
