I joined the realm for the second time, to find everything as i left it. I started with some planning, the idea was to make a dome around the underwater village near my ship and then empty it of water via sponges. I made a tunnel that would connect my boat with the dome and then started working on another project, the Top-Bottom Connector (TBC) that would simplify me going up and down to the top of the water and into my boat. I found a base with a nether portal and got some soul sand, made a new tunnel filled with water and made a small elevator. Then, on the bottom of the old staircase, I made a puddle of water and removed the ladders, so I could just drop through it. After that I located a water temple that was in the path from my boat to Blu's base, around 3 quarters into it. I noticed it still had the 3 elder guardians and went back to my ship to start preparing for a raid.
I didnt do much this time, but if i manage to increase the size of my crew from 1 to 2/3 i could raid it and get some sponges, to then start building the dome