BG3: Should You Side With Redhammer Or The Waveservants In “Avenge The Drowned?”

screenrant.com:

There are many possible allies for players to meet in's final act, but among them, Redhammer the Deviser is one of the more morally scrupulous. Redhammer is a Dwarf tinkerer and pilot of a submersible in the Lower City. He works for Lord Enver Gortash, transporting prisoners down to his underwater torture chamber and prison, the Iron Throne.

Redhammer is not a Banite or enemy of the Iron Throne's prisoners; rather, his personal notes express that he does this job for gold and out of fear of what would happen should he turn Gortash down. Either due to greed or cowardice, Redhammer is a willing cog in Gortash's machinations to gain control of the city. Not only that, but his trips in the submersible have accidentally caused the death of a Waveservant of Umberlee, whose sisters now want revenge.

Baldur's Gate 3 is imposing in stature and its best moments are truly memorable, but some early issues with scale suggest an uneven experience.

By all means, Redhammer is not a good person. His actions have caused the death and pain of others, and he acts for his own personal gain.Yet players can still use his help to save prisoners from the Iron Throne, and his personal notes indicate he is looking for a way out of helping Gortash. This makes the decision of how to handle Redhammer's fate pretty morally gray.

When the players meet Redhammer, he is working on his submersible in a hidden chamber below Flymm Cargo. He will be suspicious of why the party is there, but players have a broad selection of Charisma checks they can perform to either deceive Redhammer into thinking they work for Gortash, or convince him to help them regardless. Especially if players know that the waverservants of Umberlee want Redhammer dead, their promise to protect the Dwarf will convince him to take the party down to the Iron Throne.

There, players can attempt to quickly and efficiently get as many prisoners onto the submersible as possible, including Duke Ravengard and the Mind Flayer, Omeluum.