I got 6 at the moment and they're feisty, stating it nice.
the one female that ever spawned a few times died 2 years ago; she was greatly weakened by medications I had to use for infections on the Madagascar cichlids
a big mistake, since i almost killed off every catfish in that tank back then....

the other 4 got better, but not her
afterwards it turned out her gills were damaged too badly and after breathing rapidly for 4-5 months and me moving house on top of that, she died
that threw the equilibrium in that group, since she was the biggest by far.
I have never seen any spawning attempt after that.
my 2 males took the chief's hat, so to speak; now I'm quite convinced that a group of granny's ruled by males is a mess; you'd need a big female to give stability.
recently I added another pair, now ending up with 3 males and 3 females
unfortunately the biggest fish in my group are still the males.
the only way I canm fix that is trying to exchange 1 or 2 smaller females to 1 or 2 large ones.