Is this club head made for 0.355 or 0.370?. I got a set of this blades (just the heads). Have you experimented with muscle backs with shafts like TT XP95?
Those heads take .355 taper tip shafts. I’ve seen excellent college players use the XP95 S300 shaft in them and do very well. Be sure you get the taper tip model since they make an XP95 in a .370 parallel tip. Here’s the link to the taper tip XP95 – https://www.golfworks.com/true-temper-xp95-355-steel-iron-shafts/p/tt0101/
The shafts are lighter than the True Temper Dynamic Gold shafts, so you may need to adjust the build for your preferred swingweight.
Hope this helps! Michael