I like the minimalist fastpacking list.
It could use some work, I just posted a minimal gearlist for the same weight including in clothing, a full wind suit, a full extra base layer, warm hat, extra socks, insul. vest.
You can not always rely on the down gear, so you have to have a clothing list that will keep you warm down to at least 50 or 40 degrees if needed. and yes it must be breathable.
and for a small load your g6 will be too big and will sagg pulling onyour shoulders.
check out the MLD packs
OR zealot jacket?