Its gonna have to be either Bismark or Leviathan. They are both boring and they have a mechanic that if you mess up you wipe. And I have been in one too many lackluster parties where Leviathan's shield is missed (even if I am a tank I now literally just book it to the thing) or the harpoons are missed on Bismark making life hell. Or no limit break on its back, people falling off. Just ugh.