If there's no plan yet, then here's an idea.  If anyone wants to edit it or reject it, cool...

Let's say that Kristo, Mihn, Max, Rizx and Mort share a 5-man cell.  1 guard on duty tonight.

Mihn and Max pretend to have a fight in the evening, to draw the guard on duty to their cell, then they beat the crap out of him, tie him up and take his cell key.

Dress Kristo in the guard's uniform.  Unlocks cell with the rest of the party.  He uses charisma 100 to escort Titus past the guard at the entrance of the Guard House.  Mihn and Rizx in the shadows in case they fail the persuasion check and need to quietly kill/KO the 2nd guard.

Once the party have the map, they regroup outside the Guard House and we go from there.

Anyone up for that?

Or maybe Erith instead of Mort in the 1st cell where the fight takes place, as he's more believable as the cause of a fight lol