Too bad you can just unlock the recipe without having to go to the cave. Oopsie. And all the bosses drop black blood, so our pal is setting up some serious Earthworks over there. I took an early night because my ping was bad, and I wanted to conserve energy to help him with mats today.
Like @SirDaveWolf said, the dungeons have been problematic to say the least. I waited until June of 2018 to go to the Dregs, considering the changes and inconsistencies. Usually I like to wait for things to stabilize before I go in there, especially if I’m making a movie or a guide. Is it fun enough to jump in? I’m doing things differently on this server, so I’m mostly “why not?” this go 'round.
If I were you and had an actual permanent base, I’d extend my perimeter with flanks of drawbridges.