gleichnerr wrote:
Wondering if there are any easier ways ...
Rather than mitering, I find that I prefer the finished look of coped (overlapping) joints
I finished my baseboards having bought raw millwork from a local supplier. This was a 1x6 oak base molding, which is quite a slab to cut through. I did all the coping by hand using a coping saw, and a little help with small files to get the fine detail or clean up an edge.
For hogging out the bunk of the material, I tried using power tools but never had much luck.
For soft/small pine, you'll have no trouble just doing it with a saw. My advice would be to finish it first, though. The finished surface somehow makes it easier to follow the edge.
But I have yet to find a coping saw that lasts. They lose their tension after a while.