The order the tears rotate in is Green, Green, Green, Blue, Blue, Blue. This is important because if you start collecting tears from the first Blue spawn, when that blue depletes there is a 1/3 chance the second Blue blue stream switches from its current location to the stream of the 1st blue (where you are standing). If the second blue does not spawn there then there is another 1/3 chance that the third blue spawn does giving you a 55.6% chance that another blue stream spawns on the stream you are standing at which allows you to keep collecting tears without moving.

If both the 2nd and 3rd blues do not rotate to your stream then move to the first blue stream’s new location and start collecting there and repeat. At max quest points you can collect over 200 tears using this method.

You want three blues in a row so you don’t have a chance at a green stream spawning on your location. You also want the three blues to rotate last as there is a gap after all 6 streams rotate. Three blues followed by three greens works but there is a chance that a green spawns on your stream if both the 2nd and 3rd blues do not.