I still don't believe that you need to split into separate RGB's and do your hot pixel removal.
I would leave them as is and put them into DSS with my dark, bias and flat frames and select the hot pixel removal from the stacking menu and see how they come out. I would be surprised if there was too much difference.
Dark frames should help remove hot pixels, as well as a bad pixel map or dithering your mount while imaging.
It doesn't need to be that hard.
