Love those wild angels. Theres only a few other fish I would keep other then Discus and wild angels are on the list Only thing I would warn about is you need to be very careful not to cross contaminate anything with your Discus tank and wild Angel tank. I'd put money on it being a terrible mistake.
These wont be kept with the discus dont worry. They could be mixed but there is a chance the wild angels carry some pathogen that could harm the discus, is that why u advise against?
Yep. Even mixing equipment (ie using the same siphon) could spell disaster.