at 40y I'd probably use PW, 75y 8i depending on lie and sand conditions, if the ball is setting up on top of the sand I'd probably use LW and hit the ball first.
I would definitely use a pitching wedge. Also I found it very easy to hit short irons and even hybrids out of bunkers as long as the lie isn't too bad.
i would hit a short iron, the same as a greenside bunker shot.