I am 100% certain the players are shooting much, much better in practice. Great, even. So I don't think the coaches need to teach them how to shoot. They already know how to shoot. What they obviously need is the ability to shoot the ball in games without thinking so much about it -- like Rae does.
This team's shooting woes are 100% mental. They appear to need someone to have the hot hand early to get everyone else loose and relaxed and not overly worried about whether anyone is ever going to start making shots.
I've seen many a team like that over the years, and the teams that win championships are the ones with scorers who never fall into that mental trap. Our players could benefit from extensive, very serious shot visualization meditation before games, seeing themselves in their minds' eyes making shot after shot after shot after shot.
That's my theory!