It depends
In the winter/fall when stopped for a break/lunch/etc- my puffy goes over the top, this is simply for efficiency sake- it's quicker to don/remove. Keeps the heat in while stopped w/o much fuss. If I'm going to be glassing (or something that's going to take awhile) I usually layer it under a windshirt or hardshell. If there is a lot of wind or precip- it always gets layered under.
if it is not wet and I am stopping for a while for glassing or eating something or such, I juts put my down pro jacket over the softshell I am wearing and that is normally plenty.
If is is going to be long stop like when I get to camo or it is wet then I wear it underneath.
I'm same as the previous. If alternating still/moving for short periods of time still, it's not raining, and I want it off when moving, then I'll leave it on the outside for ease of removal. Any other time it's under the shell.
