Regarding mosquitos, I'm fairly certain that should be better than when I was there last month but I can't say for sure. My clothes are treated with permethrin so I'm going to leave the picardin behind. Head net saved my bacon in Indian Henry's last month so it's going for sure.
I'll take another look at the top layers. If I had to choose, I'd probably keep the nylon shirt and ditch the silk weight top. Probably sleep on it and make a decision tomorrow.
I'll add the sunblock.
The only reason I'm bringing the vest is to bolster my sleep system. FWIW I'm a warm sleeper. I'm expecting nighttime lows in the mid to high 30*s but with what I have I'm ok down to the 20*s. I have a down sweater but it's pretty heavy at >14oz. My plans are to upgrade my down sweater and rain shell this winter to something lighter but unfortunately that doesn't do me any good now.
Haven't ruled out the down sweater but right now I don't think it'll be necessary.
Edit: Looked at the numbers again. I'm going to leave the silk weight top and down vest at home and bring the down sweater. No weight change and I'll have a warmer system. Thanks for the suggestion.