I too think its a very good idea, but sometimes is not so easy. At one time one thinks it goes really well with one species and then suddenly something happens and again you end up with one single fish and no wife or husband 🙁 … – so in a way you really have to have quite many fish of the same species in order to really be ‘godfather’.
At this present time I have a really exellent parent-couple in p.Nagyi and they produce many offsprings. What I think I have to do, though, is to wait for these offspring to grow up, find males and females and have many ‘pairs’ – minimum 4-5 pairs, and then I would feel okay sure that I had a sure base from which I could distribute any offsprings.
At the moment this is what I try to do with the p.Nagyi and perhaps p.harveyi, of which I also have quite a lot (though females is never many, also not in the offsprings) – but I think its better to keep to one or two species instead of many.
Which of course means 😉 that I have too many species .. ah, but which ones to not have ?
Anyway, I wish you luck, I think it is really good what you aim to do