I'd also recommend using the HeetSheets thermal-reflective groundsheet.
And put the Klymit pad inside your sleeping bag, because it stays warmer that way.
You can use the CCF pad under the sleeping bag, and on top of the groundsheet.
With the Klymit pad inside the bag, it stays as warm as you are. It allows the bottom of the bag to give some loft in the "loft pockets" of the Klymit pad, and it also dramatically reduces any convective heat losses or conductive heat losses to the cold air outside.
The main problems with air pads is that they are too thick, causing convection losses, and they are too exposed to the cold outside air, especially on the sides of thick pads, causing conductive losses.
And you squash all the down loft underneath you that is in the bottom half of your bag, so it doesn't insulate well.
Putting the Klymit pad inside your bag addresses all of these issues, and there will be an improvement.