At least 10% lower, so 56 at the high end. With the tight string pattern you certainly could go 20% lower and not trampoline at all, so 52 would be good.
If you are getting into the 40s and 30s, you are using the properties of the poly strings in a different way that isn't very usable with the Nvy so really wouldn't be a side-to-side comparison.
I'd go with 52 lbs or so to start with as a side-to-side comparison (maybe a little safer on your arm than 56 to make sure your don't have arm issues).
After that, if you think it might be for you, start experimenting with different tensions.