From what I've read it's possible, but I wouldn't really recommend it. Especially with Api Api and Edithae- I'd be worried about the Edithaes trying to eat the Api Apis.
Bettas in the same complexes can often interbreed, atleast that's what I have heard... So idk if that would be a good idea....Maybe look for bettas that are in the same group,
I think that should work best!or look up what spieces that live in the same area.