Hello. I've been duo farming with my 55 monk and SS/SV necro for quite some time usually spliting ectos when I wondered about the "official" way to split ectos 50/50.
The way I've done it in the past is this:
If one falls for the entire run - that person got lucky. I don't usually sell off the ecto or have the other person sell it off.
If two falls for one person, that person give the second one to the person immediately. The person that didn't get any could go ahead 2-1 if a third one falls
Note: I don't wait until the end to "share" the drops. It's pretty much immediate sharing and hoping that the next one falls for you.
Any thoughts? Thanks.
B

?
) it goes to whoever didn't get the first one. Then in the event of a third drop, whoever. On the fourth, whoever didn't get the third gets it. And so on...