I've been using Shimergo (or Campagnono? - the front 2/3 is Campa, after all!) for nearly 20 years. I've had success using Campy shifters and Campy derailers.
I tried the Hubbub cable clamping, and it sorta kinda worked. Ditto the Problem Solvers travel agent pulley. They're both finicky IME. Sometimes they shifted flawlessly, sometimes it depends on whether you're shifting up or down, sometimes you just have to trim the derailer adjustment for which front ring you use the most and put up with the mis-adjusted derailer noise in the other rings. But in my experience, nothing beats a matching Campy derailer.