I've slept as low as 30F outside in my hammock - it wasn't intentional, the weatherman lied...
with an underquilt and good thermal underwear.
Anything directly under you between you and the hammock is going to be compressed and lose most of it's insulating properties. You're better off figuring out how to rig that moving blanket UNDER the hammock and quit using the pad altogether. It causes the condensation and then, as you know, wet gets colder faster than dry does.
Some people take their sleeping bag and put it around the hammock so that it's like a cocoon but I'm not sure how they get rid of any air gaps.
After a while of rigging blankets and trying to deal with sleeping bags inside of a hammock, most go to a top quilt/under quilt combo because it just works so much better!