Suggestions:

Considering one is noted as incinerated and the other as 'sploded, you may want to PM doc and confirm the spell is viable for their condition, but if it is, getting them up makes sense given the current situation/numbers. They'll presumably both need healing on top of that, though. And Max's combo of low health + disease is going to tap a lot of resources, assuming anyone can cure disease (cleric/druid?).

Triock/Zayd ibn Yasin should be able to polish off the wight comfortably. Might be overkill but it is a high threat.

Kyp (bow) should stay on the zombie, esp. if it's the one he already staggered

Darrim/Eranear/Svartalf (all blunt weaps?) should hit skeletons. If my hammer arm is working, I'll target the 4th. If not I'll have to figure out if I can shield slam, or just need to heal myself first.

Thras should...figure out what he can target that's helpful without killing any of the rest of us. ;) Perhaps either the 4th skeleton if I have no weapon arm, or double on the zombie.

Please forgive my restlessness. Somehow, I had the impression that trying to force an ambush in this situation wouldn't be quite effective and this old mercenary is used to follow his own instincts. (Anyway, cheer up: looking at other parties' runs, our combat looks somewhat easier and we haven't had any casualties yet)

Here's the strategy I've planned:
Plan A:
Beldarion and Og'rialt face the Ogres and try to keep them at bay. Og'rialt can do that from a safer distance while Beldarion stands in close combat, trying to block their way. If it is possible, Dunward will finish them with a fireball (I'll contact Doc to see if it is possible and not dangerous for the rest of the party). Meanwhile, Aslain and Kip protect Dunward and attack the orcs (they might be easier oponents, but we don't want them on our backs)

Plan B: What Og'rialt suggested. Retreat to the tunnel. I'll cover your rearguard and when we're out, let some fireworks light the room.

A question to the southern side tunnel team. Will you guys keep attacking the orcs or will you come this way? The door leads to the main chamber and there is a lot of fighting there. There is also one door that nobody checked. If you keep fighting I will come back and check if not I will probably help the other party in the main chamber.I have high perception so I can detect if anything is behind the door like I did with this corridor.

Anyway here is what I will do this turn I might change things depending what the other team will do.

69 - Rudy - Human Ranger Decides to stay in the dark corridor and prepare to hit any enemy that might come inside with his bow and his summoned bear..

"That is rather unfortunate..." Dunward was briefly puzzled, but after a moment he added:
"We can also consider setting up ambush by the door as it was planned - I believe the enemies will be able to cross them one by one so we will be facing one enemy at a time. You with Beldarion could back out immediately in the same moment Kip and I we will cast Fireballs, as suggested, and run behind you. You will be waiting at both sides of the doors for each enemy we behind you supporting with spells. This is a risky plan I know but I believe it is either this or escape. I do not think we have a chance in open where we can be surrounded."

I keep attacking the 2 skeletons in front of me. A couple of centuries ago I did fight defending the Northern Lands against the Invasion of the Undead Horde, I got used to crushing those little piles of bones!

Darrim, Dwarf Warrior

"Ai-oi !" (Over here !). That abomination contamined me ! Is a Healer can help me ?

Seeing as his attack was quite successful, Triock Ulagolor turns to remaining Wight, aiming for its head. But before that, he looks at Max, son of Fulvus, thinking for himself - "He's just Dwarf and also a thief ... but he might still be useful, even only as a cannon fodder" and cast curse disease on him.

"Much though I admire your bravery, Beldarion, I do not think even you can stand against four Ogres.. My own effectiveness against them... well, I gave that one Ogre my very best, and you can see the result for yourself! These Ogres need softening up first, and some fireballs would be just the thing! I agree with Dunward, and say we execute plan B!"
So saying, and while the Ogres and orcs are still caught off-guard, Og'rialt swiftly backs out of the room, letting Dunward and Aslain go first if they also execute this same plan, and then stepping aside (in the direction of the small tunnel!) so Dunward and Kip can lob fireballs into the room.

If I can do so on the run, I prepare my weakness trap for swift deployment.
If I can still lash out with my chain at any enemies exiting the room, I also do so.
Getting out of the way of the fireballs - and staying out of reach of the Ogres - takes precedence, though.

Damn, that spell was more powerful than planned. Sorry
Thulgrun! Someone please bring him back, if possible!

Meanwhile, to avoid further collateral damage, I whack the closest enemy that remains after all the turning and casting with my staff.

Beldarion reconsiders the situation (after mumbling something about the least lucrative expedition he's ever joined):
"Ok, let's do a glorious retreat then. I will defend you and be the last one to exit the room. You are closer to the door than me, so they shouldn't be able to get past me. Just remember one thing: I can endure fire better than ogre blows, so don't hesitate to use you fireball if I happen to be overwhelmed by our enemies."

Says Beldarion swiftly exits the room after the rest of the party, trying to block the advance of any incoming enemies with his sword.

"Alright, Og'rialt. We'll follow your plan... Let's just hope the gods don't send us any more surprises."

I head for the small corridor Og'rialt mentioned.

I really do not know what skillz of spells or what ever i have, doc could you tell me about me some time?

You mean to say that you throw the fireball into the room, right? Out here in the corridor, its blast radius would be the death of us all.

Well, that went about as well as I expected. My notorious "luck" strikes yet again. Thankfully, Babargh was there with his Globe of Protection, otherwise, it would have been very VERY bad. Along with Arsalan's point blank Fireball, we could have killed more of us by ourselves instead of due to the undead.

Some people haven't been as lucky though and 2 have died so far. Not sure if the corpses look resurrectable....

Max got badly hit by a Wight but somebody is already casting Cure Disease on him. I also have 2 Cure Disease potions on me, but I guess I will save them for another time.

Seeing as how only one injured Wight remains and it is currently being attacked, not willing to risk another Fireball (as they are clearly immune to normal cold steel), I engage the remaining skeletons in melee with my Warhammer along with others currently fighting them.

There is also the question of the magic ward on the second right door most seem to have forgotten about before the undead showed up. We should decide if it is worth investigating.