Ebonitus calls upon the Earth mother to repair his wounds and smacks his spiritual hammer down upon the head of on of the archers leaning over to fire at him.

Cure Wounds (2nd level) recovering 14

Bonus action: Spiritual Hammer:  Attack: 25 Damage: 9 Force damage.

Ebonitus feels much revived and invigorated by his action.

The fight continues in top of the battlements

DM rolls & other stuff

Devin's shot misses but while Ebonitus manages to hit with his Spirtual hammer and D.O.R.K. strikes two telling blows it is insufficient to drop the guard. The flames from Lukian's shield scorch all four guards in front of him - some worse than others.

Two guards fighting D.O.R.K.

First guard
Attack: 6 Damage: 8
Attack: 17 Damage: 8

Second guard
Attack: 14 Damage: 4
Attack: 7 Damage: 7

Two guards fighting Lukian

First guard
Attack: 12 Damage: 8
Attack: 5 Damage: 8

Second guard
Attack: 11 Damage: 7
Attack: 22 Damage: 8

The remaining six guards fire their crossbows at (1-2 = Devin, 3-4 = Ebonitus 5-6= Ilezenya) (3, 3, 2, 5, 1, 6) Devin (1), Ebonitus (3), Ilezenya (2)

Shot at Devin
Attack: 19 Damage: 5

3 x shots at Ebonitus
Attack: 19 Damage: 6
Attack: 21 Damage: 5
Attack: 5 Damage: 4

2 x shots at Ilezenya
Attack: 7 Damage: 8
Attack: 11 Damage: 1

And then a bolt of sickly green light spears out from one of the houses towards (1-2 = D.O.R.K. 3-4 = Lukian) xxx 
Attack: 21 Damage: 14
targeting 3 - D.O.R.K/

Almost simultaneously a giant skull headed mace appears next to Lukian and swings at him Attack: 6 Damage: 12

Over to the party but i think Lukian has collapsed

Devin fires another Fire bolt at the guards attacking him as he moves forward so he is within 60 feet of a guard

Attack: 21 Damage: 15

As a BA he then casts Spiritual Weapon next to it and a blue star appears and Devin directs the star to slam into the guard

Attack: 14 Damage: Unable to parse dice roll.

Damage 12 if the damage roll isn't showing.

((Where is the fire elemental Mephisto in all this?))

Ilezenya maintains his concentration on the Bane, and points to an injured guard and speaks words of condemnation. (Toll the Dead - DC15 Wis save or take 11 necrotic damage.)

(OOC: I assume, though can be freely corrected, that once Lukian's down, those below the battlements can't quite see him anymore. So with that in mind...)

A few sparks fly, but what little damage is done(thanks in part again to Ebon) fails to slow D.O.R.K down for more than a moment. Seeing Lukian fall however, the living construct changing her tacts slightly to aim more to press one guard into exposing his guard with a few well placed feints, before going for the kill. Come what may of that effort, D.O.R.K immediately after called out a divine word, calling Lukian's spirit back to his body, and mending it, if only a little.

Action: Spear Strike at guard(same target as last turn).
(Lethal, One-Handed, Melee)Spear - Attack: 14 Damage: 8 non-magical piercing.

Bonus Action: Cast (3rd level)Healing Word on Lukian, restoring 9 HP.

Yes, Lukian collapsed with the second guard's first swing. So, his second swing would also hit for an auto crit (because he's in melee, presumably), which would be two death saves gone. Then, the skull-headed mace appears and hits as well, which is my third death save fail. Lukian is dead dead.

(@DDP: Oof! Don't got nothing on that at the moment. If Lukian is murderated to that extent though, then instead(with DM permission) D.O.R.K will instead for the first time cast Celestial Reinforcements, summoning red, spectral humanoids of various races in archaic armament.)

Ebonitus looks around the battlefield. He sees Mambo is too far away to communicate with, he sees Devin backing up from the South entrance, he sees Ilezenya taking shots at the guards. He begins to realise, that they are hopelessly outnumbered and need to take a speedy strategic withdrawal. He uses the helm of telepathy to link to D.o.R.K. using detect thoughts.

For his bonus action he sends a message telepathically to D.o.R.K. "We have done our job here and need to retreat. Jump back down to where you climbed up and we will make a run for it - if you need healing, I can look after that. Hopefully the others can give us some covering fire."  

Ebonitus then takes what protection he can from the wall. 

D.O.R.K. - what do you want to do - should post #3667 stand?

(@Grant: She cannot move without provoking OAs at advantage. And since she'd be acting before Ebonitus, she wouldn't be able to react to that new order. Even if she could, she would be more invested on getting Lukian's body over the wall. However, since that would take an action and incur OAs from maybe 2 to 4 sources still, she has to stay her ground until numbers thin. And she is not want to surrender, least she divulge too much, or is somehow repurposed to serve these guys.  Soooo, if post #3667 would stand as-is, no changes there. "Bad Case" scenario, she's captured still, but a rescue op with hopefully elephant, elemental, giant assistance will be on the table. Worst case scenario, she dies, but C'est la vie in the end. :S)

(In the worst case scenario, hopefully she lasts long enough at least to give others time to escape.)

And one was left standing

Lukian collapses to the ground unmoving, Almost immediately thereafter  small red weapons start to swirl around D.O.R.K.. As they do so a fire bolt explodes amongst the guards and a large blue star springs into exisitence. Ilezenya is able to identify one of the guards fighting D.O.R.K. that seems to be somewat worse for wear and the sounds of the death bell ring out 13. 

As the red weapons pop into existence there is a shouted command from one of the guards at the back and those guards fighting D.O.R.K. step back and pick up and load their crossbows. As they step back D.O.R.K.lunges forward and attacks Attack: 10 Damage: 8.

Perceiving D.O.R.K. to be the greater threat and not being prepared to enter the maelstorm of death caused by the flying weapons the guards switch their fire from the rest of the party to D.O.R.K. and six crossbow strings twang almost simultanteously
Attack: 15 Damage: 6
Attack: 20 Damage: 2
Attack: 8 Damage: 10
Attack: 13 Damage: 7
Attack: 9 Damage: 6
Attack: 22 Damage: 10

Suddenly the maelstorm of weapons surrouding D.O.R.K disappear as the skull headed mace flies at D.O.R.K. Attack: 19 Damage: 12

D.O.R.K. takes no damage but is once again exposed surrounded by 9 guards

 Over to the party!

(@Grant: As a note as well, at the start of the guards turn(last turn), those that were within 15ft of her at least also needed to make a Wis Save(DC 14) to take half of 10 Radiant Damage prior it being dispelled.)

(2ndly, can she get to Lukian this turn and jump off now that they've backed up. And 3rd, how many OAs would D.O.R.K atm the moment in the process of doing so. I assume none, since they grabbed crossbows, but just want to be sure I'm not misreading anything.)

Ok will calculate the saves 

pick up the body is an action. Is jump an action or movement. I’m inclined to think the former but happy to be convinced otherwise. No attacks of opportunity at this stage.

Jumping is not an action,  it's part of movement. 

Jumping

Your Strength determines how far you can jump.

Long Jump. When you make a long jump, you cover a number of feet up to your Strength score if you move at least 10 feet on foot immediately before the jump. When you make a standing long jump, you can leap only half that distance. Either way, each foot you clear on the jump costs a foot of movement.

(With all that in mind..)

For the brief while that the spirits were at D.O.R.K's side, they gave no quarter. Phantom weapons are swung and swept about through the guards, slipping past their armor as if it weren't there. And yet, those whose will and souls prove weak would feel all the more certain of having been struck by the real mccoy; their flesh burned and bones bruised as the divine energy swept through them.

Little to none of it might've felled at least one guard. But encouraged, if only a little since the fall of Lukian , D.O.R.K more aptly deflected shots off her shield, or shifted in time so that denser metal plates caught the brunt of the barrage. Then, her connection is severed abruptly to the spirits. D.O.R.K can only watch with deep concern as the each turn into a red mist that soon faded altogether from view. Alone then at the top, she held her position for a few seconds more, stance low, shield and spear at the read, and eyes darting back and forth between the various remaining foes.

Moorless without contingencies, only a command that held little hope of success with archers and some unseen enemy spellcaster(at least to her at the moment), D.O.R.K almost freezes up on the spot. To delay the enemy there would've been for the best in the immediate moment, as every second the rest had to ride off on their mounts meant greater odds of success. She was... expendable. Flawed. Broken. No plan is guaranteed to survive contact with an enemy. The living construct hadn't forgotten this. Not even for a second. But how many personal failings must she accept before listening to the truth? A relative newcomer had fallen in her place needlessly because... because of her.

Her hand tightens on the spear as her thoughts only grew grimer by the passing second. Then... she dropped the spear, and seemed to relax her stance as if in surrender. Ebonitus however telepathically hears in a far too calmly spoken voice, 'Understood. I will be down shortly. But, do not wait for me or Acolyte Lukian. He has been... terminated. Send for Harshnag at earliest convenience, if possible.' Immediately after, D.O.R.K suddenly rushes to the side, picking up, and throwing onto a shoulder Lukian, before immediately hoping over the wall to join everyone else outside the ruins. If she can land near her horse, or that of the others, all the better. But her focus upon landing is to limp to the nearest one available, ready at least to hop onboard. 

Bonus Action: Reply to Ebonitus.

Action: Grab Lukian's body.

Movement: Hop back over the wall.

(@Grant: Would roll the fall damage, but figured they may be other factors to consider. So, leaving it to ya.)

Ebonitus is pleased to see Dork grab Lukian and hop over the wall, He watches carefully as she lands to see what can be done to help as needed. If his horse is nearby he will collect the horse and mount it to ride away to the others. To D.o.R.K. he uses the helm of telepathy to message D.o.R.K. "Well done, now let's get on the horses and make a run for it."

Action: Mount horse

Bonus action: Message D.o.R.K. (saving throw if needed to save concentration:21) 

D.OR.K. scoops up Lukian's body and clambers onto the battlements and leaps to the ground below (Athletics roll = 16) and while stumbles manages to stick the landing

He lands near Ebonitus who is looking around and whistling for his horse in vain as the horses are nowhere to be seen (OOC - you dismounted in the middle of battle and expected the horses to hang around untethered I DON'T THINK SO!). The only party  member still on a horse is Devin.

Devin and Ilezenya - what are you doing?

Devin breathes a sigh of relief as D comes down from the wall though he has a look of concern when he sees that she carries Lukian's limp body.   He rides over to D.

"Give me Lukian so you are unburdened. Let's get out of here!"

Devin will take Lukian and drape him over horse in front of him if D hands him over.  Either way he turns his mount and heads away from the ruined town. As he does so he casts Spare the Dying on Lukian trying to save his life. 

Ilezenya is shocked when the warforged construct launches itself over the wall and falls to the earth several feet away. "Didn't see that coming!" he mutters to himself. Now forced to find a way to get away, he maintains concentration on his Bane (4 of the guards have to subtract 1d4 from all attacks and saving throws) but casts his Sleep spell in the middle of the guards! (affects 27 HP) He then moves 30 ft away, his shield held behind him to try and block any incoming bolts...

(@Grant & Pal54: With that in mind about the horses, which was as feared, D.O.R.K will let Devin take Lukian and run off ahead.)