Baselayer/mid layer question

Lot's of elevation gain or relatively flat? If you're going to be doing a lot of hard hiking, both would be too hot for me personally, would only be able to wear it starting out.

Once i'm warmed up and exerting, a windshirt and a mid weight baselayer is good for me at that temp range.

On my last trip (the weekend before last), when i started out in the morning it was about 35 and i had in between a light weight and mid weight baselayer, a polypropylene fishnet, and a Houdini, and after about 15-20 mins i was already over heating and had to take off the windshirt, and as it warmed up temp wise, had to take off the fishnet too.

But if it's pretty flat and you're going at a moderate pace, then sounds like either should work ok.