You need to understand what the dark frames etc are for. You're using DSS, might suggest you read
this and
this from their website.
The dark frames basically are to remove hot pixels from your light frames. But if you use in-camera noise-reduction (ICNR), the camera is effectively doing this in-camera for you, so taking dark frames is redundant. And taking dark frames with ICNR doesn't make any sense at all if you consider the above.
So if you're using ICNR, you don't need darks.
If you're not using ICNR, you need darks taken at the same ISO and shutter speed and temperature as lights, but make sure ICNR is off for them too.