Greetings & Salutations One & All
Although I'm not qualified to tell anyone How to beat a luftberry, I do have info as to HOW a WWII Ace & Luftwaffe pilot, Hans-Joachim Marseille, beat the Luftberry Circle many a time, included for ur pleasure & edification is the following:
Google" the info, searching for Hans-Joachim Marseille., or Joachim Marseille.
Learn from a real life expert fighter pilot.
Best info is on the wikipedia.org site