I've been beadstringing with sterling and semi-precious stones and selling at shows for the last 3 years. I haven't actually used my own lampworked beads yet, 'cause, they're, well, crap,
but when I do use heavier beads, or other people's lampwork, I use the professional series 49 strand of Beadalon in .018 diam. It holds up pretty good, although, it can stretch a tad.
This past year, I've gotten into wire work where I make bangles, brangles, and linked wire bracelets. I've used lampwork beads on 12 gauge sterling to make bangles, 14 to 16 gauge sterling to make the brangles, and 18 - 20 gauge silver to make linked bracelets.
Hope this helps.