I don't think there is a lack of reliable information. Extremely low DOC like other blackwater fish and you should be fine. I treated mine like any other Heroine fish -- they would eat anything I gave them, they like warm water (84F+), lots of frequent water changes, and preferably a low pH with soft water. Once you get them through acclimation and you follow those guidelines they should be fine, just like wild discus, altums, Satanoperca, Hoplarchus, and various pikes (which come from similar water). It's finding healthy individuals to start with because most LFS and importers don't know how to properly acclimate and treat new arrivals.
A lot of experienced cichlid keepers in Europe are keeping them and they've been successfully bred by several people.