I agree with all of OM's advice.

If it was me, I wouldn't take the down jacket either except for the winter NC trips. If my baselayer (sleep clothes), hiking layer and rain layer aren't keeping me warm enough, I'll use my sleeping bag. Haven't had to do that yet at least.

You didn't say pad couldn't be changed so get a NeoAir model for another several ounces.

How about trying out a homemade tarp? Save over a pound.

BTW, I'm impressed your FAK is just half ounce.