Will the leads drop if the dungeons are soloed? I got the coral aerie drop on normal the 1st try, but that was 2-manned with companions and only I got the lead. For Graven Deep I've soloed the entire dungeon on normal a lot with both a companion and not, and that's only after farming the 1st side boss only for far too many times ive that I said screw it and actually made a build to pass the gatekeeper with my dd just so I could give myself 2 more chances between resets. Ive yet to pick up the lead, but I have gotten pretty close to completing my collection for the dungeon sets' weapons. The only thing I can think of preventing the drop is whether I'm in a group with other players or not.