If you don't want to use a render preset from the ones included, here's what I'd do starting from yours:

-Switch to Optix instead of CPU rendering - your 3080 should be more than enough for that! And that will give you much faster render times. 

-Increase your bucket size - rule is usually smaller buckets for CPU rendering, larger buckets for GPU rendering. You'll probably want something around 500 there, but a divisor (is that the word in english?) of your render size if you REALLY want to optimize it. I usually leave it at 500 exactly because I tend to render at 1500x1500, 2000x2000 or 3000x3000px.

-Reduce your pixel samples - P13's version of Superfly uses less of them for the same quality.

-I'd also use Progressive Refinement mode - this way I crank up the pixel samples and then stop the render whenever it looks good to me, instead of waiting per bucket.

Yes I saw that this post is a bit old, but perhaps that information is still valuable for anyone that might end up here and wants to understand a little bit more of the differences between P12 and P13 Superfly :)

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.