Thank you for this detailed explanation.
Not sure if I made a mistake in the case I filed.
Firstly, I used a single summon for all the defendants. Also, I listed the director of USCIS (Ur Jaddou), director of USCIS national benefit center (Terri) and my local field office director as the defendants.
Then, I served the Office of the Attorney General, US Attorney in my local district and the USCIS general counsel. Have I committed any blunder?