The game takes between 8-15 hours to complete EA. It very much depends on the experience level of the players but you are looking at 2-3 sessions of 4-5 hours.
That feels like a very short estimate. I am pretty sure in singleplayer first playthrough took me 20-30 hours - and in my experience coop play take longer, with multile hotbar/inventory managements at different times, thinking in turn based happening one at a time, rather than forming one plan and than executing it.
Or it that playtrhough of experience party? Know content, don't read stuff, skip cutscenes and dialogue, have combat encounters pretty figured out.
