Right, but the primary issue for the OP was stress on fretting hand, and I'm pretty sure that those may still have higher overall tension even 2 steps down than the SB's he settled on for now.
What I do like about GHS' site is that that they actually have a table showing tension of a given string at different pitches, so one could calculate that tension I desired.
The secondary issue was overall tone; and the simple issue of how much that lowered tension affects things like "snap" and sustain for hammer-ons, etc, even fret buzz if "too floppy".
IIRC a silk-core set whether SS or SB is still going to yield the lowest overall tensions available.
:smile:
fwiw, GHS has a PDF string guide with tension summations per set...
http://www.ghsrep.net/uploads/2/2/2/5/22258814/ghs_acoustic_guitar_string_guide.pdf