Well, after today's round I've decided on a different plan to pare things down.
What I was carrying for fairway/control shots was the FD and the PD and I also bagged a lone FD3 that I mostly used for utility type shots (rollers, thumbers, etc.)
I've decided that rather than find a tweener type disc between the FD and PD that would replace both of them, I can actually eliminate the PD and use the FD3 in its place as they both have similar flights.
I took two PD's out of my bag and added another FD3 so basically I've eliminated one mold and am carrying one less disc.
Tomorrow I'll play a round or two with the FD and FD3 covering fairway duties and see how it goes.
theres no hope