(A tiny creature could undoubtedly fit through the arrow slit without problem. A small creature could probably fit through, provided it makes a reasonable good dexterity (Acrobatics) check. But the slits are ten feet off the ground.)

You no longer see the face in the slit – just a dull blue glow.

Jurgen says “just like last time, I think I can fit through there. “

From out of nowhere, Fergus hears a small voice. Laiti's.

"Get ready to move! At least that's what Jorzu said. I don't know what he's doing exactly, but I think he's sending out two goblins or something. I have no idea," she says.

Fergus:

”Right,” replies Fergus to the unseen voice.  “Be ready to move,” he whispers to the others, “Jorzu is about to put his plan in motion.  We should have some targets soon.”

(You are still scattered behind boulders some 75-100 feet away from the doors. Does anyone intend to approach? Or how do you want to prepare for whatever Jorzu has planned?)

Boona readied herself as ordered.....but honestly if nothing happened in the next minute or so she was going to walk up and push the doors open.....

Fergus:

”Let’s creep forward and be ready to sprint up and get through those doors if Jorzu can get them open,” suggests Fergus, really not knowing what the plan is but trusting his friend.

“If we stay together, Quinn’s spell should cover us,” he adds.

Stealth check if needed to creep to within dashing distance of the door:  20 (rolled in discord)

The shadows clinging tightly to him, Fergus moves behind a rock about 50 feet distance from the double doors. 

The doors remain closed, the arrow slits empty; all remains quiet. 

Where would everyone else like to be?

When Fergus moves, Quinn follows right behind him.

"Everyone, move. Stay close." Quinn growls in a low gruff voice.

He remains hunched down low following contours of the land and dipping behind boulders along the way. He reaches down and grabs a dart with his free hand.

Stealth check: 21

Quinn joins Fergus, nearer the closed doors. The shadows continue to cling to him. (Anyone within 30 feet of Quinn has a +10 bonus to Stealth checks.)

You wait a little longer. 

"Uh oh," exclaims Laiti, still invisible, without explanation. Then, with a tiny whirring of wings, she goes quiet. 

Boona is nudged by Bryony to stay close to Quinn and she attempts to do so as she shuffles up....

Stealth-22

Perception-0

Quinn tries to track the sound of Laiti’s wings whirring off. He also tries to get a better look at the structure to see if there’s any other access points.

Perception check: 12

“That can’t be good.”

Quinn can see next to nothing in the darkness - just two blue rectangles marking the two arrow slits above and to the sides of the massive door. Having studied the entire mountinside from afar at length before the daylight faded, Quinn doesn't recall seeing any other obvious entrances, although there is a lot of rocky ground that they could be hiding in.

But then, suddenly, the doors open! A very confused goblin stands about ten feet inside (some 60 feet in front of the party) looking around wildly. He doesn't appear to spot you yet. He seems startled by the doors opening. He doesn't appear to be armed, but does wear studded leather armor.

There is no sign of Jorzu or Laiti, nor anyone else save a single goblin.

Fergus:

”Right, that’s our cue,” says Fergus, adding, “proceed downstage forthwith,” as he moves and dashes through the doorway, stepping to the side to avoid being in the way of anyone else joining.

Still under the effects of Quinn's spell, you are still unnoticed by the confused goblin inside the door. Everyone may act first, then you should roll initiative.
Fergus dashes forward; the rest of you are about fifty feet from the door, and may now act. Only a single, unarmed, confused goblin is visible inside. 

Boona allows the others to move ahead of her....trailing after Quinn....she has no ranged options she wants to use so just follows for now.

Initiative- 7

Jurgen, had been starting to remove his armor, like last time to fit through the arrow sit, sees the group moving forward. He gets his armor back on and follows.

Init: 10

Fergus Initiative:  5