Info:
Age: 47
Handicap: +2
Driver distance: 292 average
9 iron: 148
Swing type: moderate quick and borderline steep
I tend to deloft due to lag so I am looking for higher ball flight in mid and long irons and lower flight in wedges. I also prefer a higher swingweight club so that I can feel the head throughout the swing, wedges are very head heavy.
You might look at a shaft like the KBS Tour FLT Chrome (FS0042) which is a flighted shaft design. It is designed to create a lower trajectory for the 7 iron down and a higher trajectory for the mid and long irons. The S+ or X flex based on your 9 iron carry distance and moderate quick tempo could be a good choice.
https://www.golfworks.com/kbs-tour-flt-355-iron-shafts/p/fs0042/