Mark
Really nice!
Mate no guru. I tend to oversharp..Only been using PI for a year.
Im probably teaching you to suck eggs...
You can use ACDNR and Range selection for the mask.
ACDNR; you will need to invert the mask when applied.
Apply a mask to your area and you can sharpen with HDRMultiscaleTransform. Lower the number, tad more harsh. Tick intensity. Change numbers till happy.
When you are happy overall and near completed; hit the luminance button. On the luminance photo; darken it using auto on the histogram or darken it a tad and apply MLT to it. Blur your coloured photo now with convolution and use lrgb combination using the luminance.
MultiscaleLinearTransform
use layer 2 +0.100
Use layer 3 +0.030
You can use imageintergration and use master lights as well for a luminance
Official PI video
https://www.youtube.com/watch?v=upeNoiyFR7M&t=88s