Auratus do alright in groups. As long as you have enough space and hiding places, you can keep a group of them. As far as breeding goes, a pair is probably best. But a group would work too. Auratus are known to be easy breeders, so if you do infact have a pair, and you take good care of them, you should see eggs eventually.
Are you looking into getting some? Are they your first darts? Auratus make good first dart frogs.
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.
It is possible the females were eating each others eggs. I've never expereinced this myself but have a friend who had a large tank, 100 gallons or so with around ten auratus in it and the females would often eat each others eggs.
Brad, I have had femlaes eat each others eggs before. In those cases there was at least some evidence of an egg mass. With the aratus there was none. I think that the females were so intent on establishing and guarding potential nest sites that they never had time to lay. I also did not see them as much since they were always in the cocohuts or other nest sites