I don't care for air mattresses or pillows, but works for me is putting my shoes under my bivy bag as a pillow.
I then might take a stuff bag with my windshirt, which I don't like to sleep in (too humid/vapor barrier clothing like), rain mitts, gloves, etc....and put it under my head in the bivy.
Gives me the elevation that I need.
I am a back sleeper and I sleep like a dead log, so I don't move much and I sleep in my hiking clothing.
I do find that the BPL Green Hoodie gives me extra warmth wtih the hood on and eliminates the yucky feeling of skin against a plastic stuff bag.
It is what works for me....hope it helps.