I think the rhyme of ennui with BAR-by is a stumbling point. Shrug and bug provide smoother scansion; but if you're adamant about using Lobster Barby stet, I would suggest using "hardy" to rhyme unless you can find something better (I know it is n't a pure rhyme but at least it scans well). Offhand I can't think of anything that rhymes purely with Barby, except Darby!

A