The best way in my opinion is someone carry you on an Argentavis and you shoot it in the head with tranquil arrows or darts. This method works on most dinosaurs and is the safest. Have fun using this tip and I suggest getting dodo dexter pro it makes it better without ads.
If you use the bear trap strategy which is if you lead it into a Dino gateway that is shaped in a triangle and with a bear trap in the middle (Large Beartrap) and when it is stuck you must put a dinogate behind it to trap it and then knock out. (hope this helped and "If" I win could it be an Xbox voucher, thanks.)