I'm sure ill take some heat for this, but here goes.
Aulonacara can be kept with Mbuna. They can even be kept with tangs and Vics to be honest with you. The blood parrot isn't an issue either. Your issue is stocking. It's not what you are stocking, but how much you are stocking.
African cichlids are nasty, territorial fish. There will be a dominant male in the tank no matter what, you can keep pulling them out, guess what... Another one will establish dominance, then you pull him... And so on and so forth until you have one fish.
The trick to stocking is to keep wayyyyyy too many fish in the tank and then you can mix lakes.
I service several cichlids tanks in offices and I have over 50 fish in some 6' tanks, all closing in on 5".
I would say get a ton more fish and add em at once not one or two at a time as they will get destroyed. I would say you can pretty safely go up to 35 fish in there (providing you keep up with water changes).
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