Tweaking trunk torsion rods for more power

As a used vehicle service tech I've replaced hundreds of those modern gas charged lift struts on every brand of vehicle.
I've never needed to replace the steel torsion lifts on any Chrysler product. I have seen other owners with the same failure you have though so maybe its just luck of the draw.
I think the very simplest solution would be to install a good used set of OEM parts.
You might never need to touch them again. I cant say the same about the modern struts. Replacing those in 5 years or less is a safe bet.