I used to get about three years out of my wild caught Apistogramma cacatuoides. Some who had killed their partners and ended up alone lived longer. The unsubstantiated rumour on the linebreds is that fish tb got into them years ago. That would explain the shorter lifespans.
The largest number of spawns I had out of a pair of wild caughts was from agassizzi, which gave a little over 20 on an every 6 to 8 week cycle. But I can't help feeling that humans with our puny tanks are not good for fish. We create the ideal conditions for disease transmission, especially in intense farming for profit situations. We can buy fish and give them great tanks, but the damage is done before we even saw the fish.
@gwand - you have rapidly become a very skilled breeder. You also have an outlet for your young fish, and that isn't to be scoffed at. There are some commercially interesting dwarf Cichlids that are challenging and that I don't see around much anymore. Pelvicachromis subocellatus is on the same level of difficulty as cacatuoides, and Nanochromis transvestitus is slightly harder but in demand in larger markets.
If you want to test your skills, look at the various South American Dicrossus species, They are by nature short lived (as are rams) but they're weird and wonderful.
A cacatuoides is different from a lot of other Apistogramma as they're a generalist species for habitat, and are tolerant of medium water. A lot of the others need very soft. I like higher bodied Apistos like njisseni, macmasteri, hongsloi, veijita, eunotus (low in colour though) and panduro, but what do my tastes matter? I'm locked into my African forest and savannah dwarfs instead.