Puntilla is finished! I ended up using some leftover madelinetosh tosh merino light in Dirty Panther for the lace accents. The pattern doesn’t say how much contrast color you need, but I used about 35g.
I made two modifications: The pattern sets up the shoulder seams so that there’s a garter ridge where the fronts and back join. I didn’t want that so I purled the first wrong side row of the back, and then I picked up my fronts as usual. Also, I can’t stand things tight around my neck, so I knit an extra two rows of each front before I started neck shaping.