For those that aren't aware, NET rankings is the new NCAA rating system that is replacing the RPI this year. It incorporates additional data beyond just record and SOS which is all RPI used. Here are the current NET ranking for WCC teams along with their projected end of season rankings (I'm pretty sure projected results are based upon kenpom ratings).
BYU probably needs to win at least 3 or 4 games that they are currently forecasted to lose just to be in the conversation for the NCAA tournament. To have a strong shot of an at-large bid they probably need to do even more than that. Also, even though the WCC has performed pretty well so far and appears to be deeper than in past seasons, as of now there only appears to be 2 NCAA teams in the conference (Gonzaga with a 1/2 seed and San Francisco just on the right side of the bubble around an 11/12). St. Mary's is probably just on the wrong side of the bubble right now (1 or 2 seed in NIT) with San Diego solidly in the NIT.