The most KISS list I can think of if I had to strip down the simplest terms
1: Any wicking synthetic long or short sleeve t-shirt
2: Black Diamond Co-effecient
3. Black Diamond Alpine Start
4: Arcteryx Atom LT
5: Any fully taped eVent, Neoshell, Gore-Tex , or Powershield Pro shell jacket.
Give me this combination and I would be good for all 4 seasons, hiking, touring, climbing, and skiing in temperatures sub-20 degrees.