Looks like a good solid list.
My hammock pack base weight is right at 8# with a Arc blast or 7# with more minimal gear and a Zero pack both 3 season but I am a tall XL so everything is heavier/bigger/longer etc.
My hot Summer list is like 4# or so.
You can lose some weight here and there if you really want to – All expensive below of course except the tulle tube.
You could drop about a pound with a Arc blast and some other changes. More if you go with a Zero pack.
Lighter pack – saves 5oz arc blast, Zero pack saves 11-12oz.
Tulle tube bug net sprayed with permithrin and carry some insect repellent in case of no seeums – saves 4.5 oz. No bug net at all saves more like just a head net which I carry anyway.
Cuben tarp – saves 4oz
You can drop a few oz by going to a SUL down jacket but I do understand the choice of a synthetic jacket.
Probably find an ounce or two more here and there.
If you really want to go SUL in weight in the hot summer for a 2-3 day trip then minimize everything, build a M50 2oz climashield apex quilt with a neck hole (8-10oz for you) to also use as an insul poncho, IE no insul jacket and I assume you are somewhat short so would probably fit in a nano hammock which weighs 5 oz with no suspension, use a Terra Nova Ultra 20L pack weighs 4 oz, double duty 5×9 or 6×9 Zpack custom cuben poncho tarp with an emergency rain jacket but you need a short hammock, 1/8" full perforated CF pad 5-6 oz or maybe a Tewa 10.5 oz 40dF summer UQ depending and you should end up at about 4#-4.5#. If you are going to use a pad you might want to build a M50 double layer hammock to place the pad between the layers.
A 10'x5' double M50 hammock should weigh about 7.5 oz. I am working on one myself right now.
Have you checked out Loners youtube videos ? He did the At with a budget UL hammock pack. Here are two of his gear videos.
https://www.youtube.com/watch?v=_nVoX6mlmdI&list=UUL8WEJB5nk7KfEPcmtgm3dA