Virga = 8oz
GG Polycro ground sheet = 1.5
BPL bag liners = 1.3
total is 10.8
So for .7 oz more then your setup you gain a waterproof top but lose the bottom coverage and the backup shelter.
If you also take out the 3.5 for the wisp now you have some room for some frogg pants or the like. In my opinion you dont need a rain jacket and a wind shirt but YMMV.
I cant wait for your trip report on the PCT with this setup. I would have tried to meet up with you guys if I didnt have so much going on.
I know your gear setup will work nicely, probably running around stuff you have already thought of. I am trying to home brew something similar at this time.
Jeff