It looks like you’re off to a good start for building an awesome system. Remember the whole 8 piece approach. You’ve got good base layers, an active insulation layer, and a static insulation layer. That’s 4/8. You’re missing a good soft shell pant, a wind-proof layer, and better rain gear (IMO). I only use First lite base layers, but have a bunch of sitka and FL stuff, including the Klamath hoodie. That hoodie is pretty awesome. I would aim for a good pair of pants, a wind-proof jacket, and maybe some rain gear (or you could use a rain jacket as a wind layer, too). Maybe look into the mountain or timberline pants, depending on how warm you’d like them to be. I have the Jetstream jacket, which is pretty awesome, too. It’s not super warm for sitting still in the cold, but it blocks the wind and can be worn over your puffy. Don’t get caught up in brands, figure out what works for you.