If you and a friend are in need of farming eternals and you both happen to be engineers here is a cool trick..
If you both extract the cloud at the same time you will BOTH get the crystallized, and it does not split them up. I was on the same faction and I was not partied(not sure if that matters)
I have only tested it with 1 other person and I can confirm that it works with 2 people. I can not confirm it works with more than 2 people, although I'd like think it would be likely to work.