Start the neck decreases lower if knitting from the bottom up; for the spiral yoke, don't do as many decs or rows on the front neck, though you may want them around the sides and back. Not sure how that's written. On the Icelandic ones, you could make smaller neckbands. One of the tricks in knitting in the round is to do short rows across the back of neck to raise it higher than the front.
sue- knitting heretic