My two cents, having just camped this. The quickest mission by far is “The Thunder Gun Escape†Some dialog, some simple tasks, then kill X. Either wardens or slavers. Get “Four points of light†text. Check tracking. If no named spawned, drop task and redo. All of this can be done in 8-10 minutes. Other task, you have to wait for a script. And the other task, the named is extremely rare, and this drop is a rare drop in of itself. I did roughly 30 instances before I got this item. Named spawned about every fourth to fifth instance. Hope this helps.
-Feljar