For a default marching order, Lorenzo has AC 19 and 27 hp, Boddynock has AC 11 (or 14 with mage armor) and 30 hp, Gnorth has AC 14 and 31 hp, Brue has AC 17 and 39 hp, and Corilo has AC 16 and 36 hp. Lorenzo has the best AC, but he's also our healer and I wouldn't want to put him out front for that reason. Corilo has good AC and hp but is primarily a ranged weapon specialist. I think it makes the most sense to stick Brue in point position; she's got decent AC, the most hp, and, as a melee combatant, is designed to soak damage. She also has a little bit of healing at her disposal if she gets into trouble and Lorenzo or Gnorth can't get to her. That said, if someone strongly wants point position, it's all yours. This is what I propose for a default marching order: Brue, Corilo, Gnorth, Boddynock, Lorenzo.
Here, however, a straight line doesn't make sense. We're about to knock and announce at the manor's front door, so it makes a lot more sense to spread out. I think we should have someone kick in (I mean knock...heh) the front door, while two others flank the doorway, and the remaining two hold back in the wings slightly off to the sides (so there's not direct line of sight to them from whoever might be inside the manor house). If you want to stick Brue up front and center, she'll knock/kick in. Conversely, if someone wants to bash in the door, have at it (Brue will take a flanking position to either the left or right of the door frame, and will enter melee to provide combat support). This is what I propose for entering the manor house: Brue (front and center), Corilo (right side of the doorway), Gnorth (left side of the doorway), with Boddynock (ten or fifteen backward and at least one grid square to the side so as to avoid direct line of sight from the manor's occupants) and Lorenzo (same as Boddynock, only opposite side) in the wings.