100% possible solo?

[NicholasMondiale 3]

Hi everyone, I know the game is always online but you can get the Platinum completely solo. Is this the same for all DLC?
Is PS Plus required to play solo as well?

[Knispel_1940 16]

You need amazing build for lightbringer if you want to solo it. I did everything solo on PS4 except the lightbringer with 3 curses - you need broken build and very high level to solo it. The rest is managable solo