Spoiler Alert! We have some more information about how to perform this quest but recognize you might want to try it on your own before we tell you the secret...
You MUST do them in this order or you will never get the updates!
Circle of Earth - Near 52.4, 28.9 (near the Mutant Earth Flower). You will be attacked by two Mysterious Ambushers (58 Elite), almost certainly killing you! The good news is that when they appear you already have the update, whether you could see the circle or not!
Circle of Water - Opposite side of the large tree not far from where you first meet Nax.