Since my previous message (almost two years ago
) I've managed to try a bunch of different baritone string sets. Actually, I don't even have the Pono anymore as I got a brilliant Cocobolo baritone in between. The D'Addario fluorocarbon set always intrigued me but I haven't tried it. The thought of one wound and three plain fluorocarbon strings really appeals to me however. Definitely preferable to the Martin set with two wound strings.
My go-to set these days is a custom one. For the bass side strings I use Thomastik-Infeld CF35 and CF30 flatwound strings, and for the treble side I have D'Addario T4601 and T4602 hard tension Titanium strings. The Cocobolo came with Savarez high tension classical guitar fluorocarbon strings which were quite nice as well.