Durgan secures his Helm of Brilliance and heads downstairs, yelling "Stop! Stop!"
If he can catch all the intruders within a semi-circular wall of flame (Or straight line between two walls) which includes the front door, he casts it from his helm. That is to say, he doesn't want the wall to pass through anyone, just trap them on the side with the door so they can still escape. Even if two or three are left on the wrong side of the wall, he still casts it.
"Will you listen to reason now?! Must there always be a show of force?"
Sessativa casts invisibility and heads towards the secret room to secure the Key of Servitude. Perhaps she can find out it's abilities by subjecting these poor sods to it.
Durgan - When you head downstairs the group that you saw in the alley way has broken down the door and is running through the downstairs killing any who they find. The faithful in the house are running trying to escape. You can see three bodies in the front room with the broken door. A wall of flame will not block any as they are already in the house and split up killing.
Zork - When reaching the window you are just in time to see the rest of the people that were in the alley going into the front of the house. IF you join with Durgan you both see what I stated above.
Sessativa. - You will have to work carefully to avoid being ran into as you work your way down stairs and to the basement where the secret room is at. IT will take a few rounds for you to do that.
"I said stop!" Durgan looks for an opportune moment or position where a Fireball or Wall of Fire or Prismatic Spray will hit the most intruders without harming any faithful.
If there's no such option he will say, "Zork! Sessativa! Stay back!"
"Forgive me," Durgan says as he activates Prismatic Spray from the helm, catching as many enemies as he can and ignoring the collateral damage to his followers.
Well the front room of the house is now more damaged as the spray goes out and hits almost everyone in the room. The only ones not hit are those laying prone on the floor from being killed by the thugs. You killed four in the main room. You can hear fighting in the other rooms off the main room. The kitchen area, Dining room, parlor and library. You also hear someone heading into the basement.
Edited: KNtoran on 21st Nov, 2016 - 12:16am
Durgan is torn for a second about which way to go. As he waits for Zork to come down, he heals whichever friendly looks the worst injured but not dead.
"We have to split up so nobody can get past us to the front door and carry away stolen goods. Can you guard the door or do you want to go fight in the library?"