Shirts

Summer: Rain Rider Adventure Shirt
Moderate: Powerdry featherweight zip long sleeve tee
Cold: Patagonia R.5 (powerdry)

Pants

Nylon hiking pants only to sub-freezing
Then mid-weight powerdry

Insulation: light high loft vest like WM flash or montbell thermawrap.

Lots more thoughts on my mark's recommended clothing page