I had not even thought about the Pixie Hawk or Randall's (even though the fiancee is set on a Yasha).
I had a flame hawk that pestered a coral banded shrimp to death (not literally). I would be afraid the Pixie might try to prey on any cleaner, pistol, or any other invert I may have.
hawkfish are very bold fish. It would be the last fish to be added to a small tank as they tend to dominate anything added afterwards. I had a yasha and a randell that lived together in a 5 gal with no problem for a year or so until I moved. As far as hawks preying on inverts it depends on how well you feed the tank, and when adding. If you added the shrimp first it would be presumably safe. If you skimp on feeding then the hawk might look to supplement his diet with a shrimp cocktail. They also like to perch on things sometimes rock or corals which would cause irritation.
Ora dragonites eat prepared foods before they ship them they cost a little more but worth it
You shouldn't have issues with the Midas he will live in the rocks the pistol will protect the other
Where can I place and order for ORA fish? I have been looking at a few different clowns and if the dragonettes eat prepared food from the factory then the higher price would be worth it to sustain the fish and not starve it.