Are we talking about Lucky Finishes, or just luck in general? If it's lucky finishes, then I got 22k from a Grey Gremlin in the Brown Formor dungeon for G1.
If it's luck in general, then while training my mace for my ego, (Female Blunts FTW!
) I grinded Ciar Beginner since I get about 3.5 prof per run and I die only 1 those three runs due to accidentally clicking twice in a row when trying to N+1. When I got to the Golem, it critical hit me and I went into deadly. When I got back up to attack again, (I know, not smart, but meh, I just needed prof for my mace.) it crit me again, so I went further into deadly status. I got back up and tried for the third time, only to get hit and staying in deadly status. I did kill it the fourth time. And my character isn't that lucky. (34 base luck >.>)