I've had the same irons for a looooong time, so it's been a while. I remember using one of the flat par 5s at Kiawah, crossing low wind preferably. That way I could turn around in the fairway and try another club. In practice mode you have 15 strokes to work with.
What I was looking for was a combination that made the stated distances as close as possible to accurate. I found that with the 300 credit calley, It would work well with full backspin, so I got the advantage of the spin without losing distance.