Not to sure about that one.
I keep zebra/leopard/pearl danios with WCMM’s in a 100L community tank. In my experience it seems to be the females of the danios that present the biggest threat. Mine are rather territorial in particular the leopards, albeit they only chase the other fish rather than fin nip them.
However there are many factors that can dictate fish behaviour, so as i said this is purely my own point of view.
That said and done you could also consider that giant danios are pretty much mid to surface fish and CPD’s tend to stick to the bottom, depending on cover height of course (correct me if i am wrong). So with some decent planting etc they should stay out of each others way.
I’ve chosen not to mix my CPD’s, plus to be honest i think a species tank of CPD’s is a crackin sight to see. Even if you do have to look a little harder to appreciate them !