Superfly took a bit of experimenting, especially since it didn't seem as fast with GPU as it did with CPU - increasing the bucket size helped a lot (I'm still experimenting though.)

Here though, is a test render of Aiko in Superfly rendered on "Medium" settings. Originally rendered at 810x1080, it took a couple of minutes on a GTX 980Ti.

i7 5960X, 32GB RAM, GTX 1080Ti, GTX 980 Ti, Windows 10 Professional.  Running Daz Studio 4.11, Poser 11, Vue Inf 7, Photoshop CS4