I have a specialized set of PP3 files that I use all the time on my Pentax cameras. I have my RawTherapee set to automaticaly pick the appropriate PP3 file for each ISO setting. I’ve been playing with RawTherapee for many years now & have kind of figured out how much I can tweak the noise reduction settings to reduce color noise, but still keep most of the color, hence the funny looking NR settings.
The median filter basically smooths out the image a bit more. Sometimes if will kinda of smudge fine detail. It’s a matter of zooming in 100% & seeing if you need it or not.
I have a thread on Pentax Forums where I explain a bit more. Feel free to take a look at it. There are some PP3 files that you can download. You can also download a slightly modified RawTherapee build with the PP3 files already included.