Could someone tell me the least buggy path through the currently incomplete Buried Treasure quest? cause right now, 3 of it's "talk-to-this NPC" paths are complete dead ends, and Jakk Tannen (or whatever the pirate's name is) can't be talked to after the initial encounter without running into a TBD dialgue exit, and as far as I can tell, if you stumble across the salvageable Excelsior, it's permanently stuck in mothballs and doesn't seem usable at all.
Here's the path I did. I found the unique silverhaired pirate in a bar, paid him to share the details of his old pirate buddy. He pointed me to a couple of leads: A pirate contact, a salvager contact, and I think if you have the Starsector story complete, you can talk to the TriTachyon corpo on Eochu Bres about the Tritach black site. Talk to the corpo, he'll tell you about someone named Da'at, but also I think a general location for the blacksite.
Da'at doesn't exist yet, so that's a dead end.
Go to the blacksite, you'll find a wreckage field. There's a recording telling you what happened, and the AI in the recording points you in Da'at's direction, while you also see the Excelsior hyperfrigate fly in some compass-direction from the core worlds. Again, Da'at doesn't exist. And now, everytime you go to the bar, you have an encounter with Jakk Tannen (pirate silverhair) that deadends in a TBD dialogue exit.
Assuming you manage to find the recoverable Excelsior, Jakk will show up with his pirate fleet. You can try to tell him what happened to his pirate buddy, but that goes to a TBD. You can fight and kill him, but the Quest in your Intel tab says "any secrets he knew died with him". You can pay him instead of tell him, but the quest doesn't resolve. Taking the Excelsior to the Core worlds does nothing, and it's still stuck in Mothballs status.
Honestly, for as cool as this quest is, I wish there was a way to turn it off in this mod until it's actually completed.