When flying into LWS, look and see how many legs you can work into the flight. MVP via miles will be difficult but via legs is very doable. Looking in september it's $261 for SJC>BOI>LWS. For $270 it's SJC>PDX>BOI>LWS. For the 3 trips to LWS a year, that's 18 segments. The two other destinations you mentioned are straight shots so thats 4 more flights. 22 flights. 8 more and you are at MVP.
My yearly flying is roughly 28000 miles. My segments are about 120.