A usual mistake that many people do on No6* is believing they can attack the pin on any wind...well, not. On tailwind over 10mph, chasing the pin is just a waste of time for the simple reason that physics and trajectory say NO. There is a little space between bunker and pin in order to hold the ball. Once you are above the hole, you are in trouble.
With sidewind at 2-3-4 o'clock is pretty much hard but it can be done (if you are lucky) because green tends to push the ball to the right. With wind at 8-9-10 o' clock things are easier. Perfect wind for this hole is headwind when you can approach somehow with ease. Regardless the winds though, afterwards you have to deal with one of many lying dot greens of Merion.
*Same thing goes for No5 with high pin. Best approach for this one is 20-30 ft below the hole. Half backspin will work well in most cases.