I used to keep them in groups and could never get them to breed, I had a 2:2 group years ago and got a 2:3 group last year. I seperated the 2:3 group into 1:1 and 1:2 last month and have have pulled 3 clutches since then. I had them together for 8 months before that in a fairly large viv, males called every morning, even saw breeding behavior, but I never got any eggs.
Ed