I found it a little difficult si I altered it after joining the sleeves I just decreased a siting in each side of the armpit, on in the body of the sweater and one in the sleeve in front and the back each, on every right sided row, 8 st decrease per right sided row. After 12 row of decreases (24 rows total). I stared doing decreases over the shoulders, first k 2, k2tog; then k1 k2tog, and then I k2tog all over, maybe two rows consecutively. And finally the neck rib.