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Here's what Alpha Direct looks like. As you can see it traps a lot of air. It's a great insulation, but it can be stymied by the wrong face fabrics. Earlier versions sometimes had interior linings as well, which didn't help breathability.
I overheat easily, so maybe someone who runs cold would need more. For me, this banishes my fleeces that I used to wear as mid layers to the back of the closet for backcountry hunts.
You've got a bit of a tough set of requirements. Any one garment will probably be weak in at least one area you listed. For me, this is what I would grab for the conditions you're talking about, with a 150 wt synthetic or 50/50 merino/syn baselayer.
I find hoods to be extremely valuable for that sort of use. There is a major difference in warmth between zipped halfway down your chest and hood up and zipped up tight.
Sitka made a similar hoody in their tactical line, called the MDWi, if I remember correctly. There may be a few on closeout yet. The new Ambient hoody is supposed to be similar, but it hasn't been in widespread use, yet.
As you can tell, I'm a bit of a layering nerd......