Aubrey unleashes another golden beam of crackling force against the glowing necromancer (Mieniera)
Eldtritch blast: 14 Force: 13 Necrotic: 5 if necessary moving first to get a clear shot.
He then moves within 30 ft. of the other necromancer (Luogaszil) and uses the power of his talisman to telekinetically shove him back towards Rohuzar (Telekinetic shove Str save 13)

Grugga steps over the prone owl and side swipes his temple with blunt part of the shaft of his axe, opposite of the blade, looking to knock him out cold.
Non-lethal attack: 16 (advantage because of prone/restrained)
Non-lethal damage: 6 bludgeoning?

He then stalks up to the male necromancer who cast haste on himself and tries to block his way, while also calling out for Zip to attack the man. (Ideally he would move within reach of both the owl-man and the necromancer, so he could opportunity attack either just in case).
Zip attack: 15
Zip damage: 4 force
Then he calls for Zip to move another 15 ft closer to the necromancer and owlman, trying to keep it close to the action in case any of the enemies are able to flee.

The red-haired woman staggers under the blow from Aubrey's eldritch blast and the sound of ribs cracking echoes in the stormy clearing.  She wheels and Aubrey sees her eyes glow an unnatural red as she seeks him out in the darkness.  She points a finger at him and a whirlwind of flames erupts around him.  Aubrey must make a DEX save DC 13 or take 19 fire damage, half on a save.

The elf-necromancer attempts to resist Aubrey's telekinetic shove by bracing his feet in the ground: 6  

The remaining skeleton shambles over toward Guilim (Rohuzar may take an AoO) and tries to shove him away from the red-haired woman.  Guilim needs to make an athletics or acrobatics check against 20.  On a success, Guilim resists the shove.  On a fail, he is pushed 5ft toward the cave.  If that occurs, he is also pushed into the ball bearings and would need to follow up with a DEX save against DC 10 or fall prone.

Aubrey dex save: 14

With the owl-man safely restrained and Grugga obstructing the necromancer, Leelan switches his aim to the elf. Letting an arrow fly in his direction.

Attack: 20 Damage: 7

Rohuzar takes the AoO on the skeleton 

Attack: 22 Damage: 6 

And if it’s not down, will move hit it again. If it is down, next nearest necromancer. 

Attack: 10 Damage: 10 and a second attack roll in case of advantage on the skeleton 19 

“Someone get eyes on the target!” 

Athletics: 8

Dex: 6

(Well that sucks.... Hit the time of the month where the dice roller hates me and all my rolls are crap across the site after I get a few good ones... Hence the crit yesterday...)

The skeleton manages to shove the halfling back into the cave mouth where he slips on the ball bearing and goes down in a heap of chainmail.  

The skeleton’s victory is short lived, however, as Rohuzar pursues it and cleaves it with his mighty axe.  The effect isn’t as spectacular as Guilim’s annihilation of the other skeleton, but the result is the same and it collapses into an inanimate pile of bones and tattered armor.

Meanwhile, Grugga succeeds in knocking the owl-man unconscious, then moves to confront the elf-necromancer.

(Guilim can still take his turn, though he begins prone and one hex inside the cave mouth)

 Guilim will rise to his feet and move to put the skeleton in range of his halberd, wanting to destroy it for the embarrassing display he had just been put through.

Attack: 22 Damage: 7

(I have Rohuzar down for finishing off the skeleton already)

Luckily for Guilim, the red-haired woman is within range of his weapon and he catches her with his backswing.  She had been busy gloating over her infliction of pain on Aubrey and seemed to be gathering flames to her fingertips.  The blade of Guilim's halberd pierces her from behind and she gurgles a curse before the shimmering shield around her shatters and she collapses to the ground.  A large tome fastened to her pack turns to ash melts into a mushy pulp on the ground.

The elf necromancer was beset by attacks that round.  He successfully found purchase in the muddy earth and resisted Aubrey's telekinetic shove, but then had to deal with the attacks from Zip and Leelan.  He lets the beam from Zip through, taking 3 damage and making a concentration check to maintain his haste... CON: 5

 He loses control of the spell and his blazing speed fails him.  It also leaves him with no way to avoid Leelan's arrow, which catches him full in the side.  Grugga is blocking his retreat.  He looks wounded and now stands alone on the battlefield.  He looks at his fallen comrade, then down at the unconscious bird, then at Grugga.  His eyes harden.

The necromancer extends a hand toward Grugga's chest and sneers.  As he utters an arcane word of power, 5 motes of energy leave his hand and slam into  Grugga who takes 15 force damage from the spell.  He then pushes past the artificer and flees into the forest to the southwest.  Grugga, withstanding the magical assault, may make an opportunity attack.

But he is bound up in a magical stasis as the effects of his failed haste] wash over him.  He can take no action or movement this round.

Aubrey swiftly places the Hex on the elven necromancer (Hex, dex), moving first to get him in sight if necessary.
He then unleashes another golden beam of crackling force against him.
Eldtritch blast: 18 Force: 9 Necrotic: 2
He then moves into full cover behind the closest tree.

Grugga stares at the bleeding elf panting in front of him. A necromancer - evil to the core, to be sure. Grugga raises his axe over his head, ready to make the easy finishing blow, but he freezes, unable to take the last step.

((skip turn.))

Seeing an opportunity to bring down the remaining necromancer, Leelan will fire another arrow at the elf. Although this one will be aimed at the caster leg, in an attempt to neutralize without killing.

Attack: 23 Damage: 6

The elf staggers under the shot from Leelan and collapses to the ground.  

The elf and the owl-man are both lying unconscious in the rain outside the cave.  Other than Aubrey taking some nasty burns, the party emerges from battle with these evil wizards mostly unscathed.  As you gather and inspect one another to confirm all fingers and toes are still where they should be, a figure emerges from the cave.  It is Dawntreader.  He has an arrow knocked and bow drawn, but when he sees you standing relaxed over the enemy, he does the same.  He looks considerably worse than when you last saw him.  Some hair is singed and there are scorch marks across the front of his armor.  One side of his cloak hangs lower than the other as a severed, rotted hand still clutches the fabric.  He's moving with a slight limp.

Perception DC 15 (disadvantage if you don't have darkvision): 

 He breathes heavily for a moment, looking up and letting the rain fall on his face, and then he looks to Rohuzar.  "It wasn't inside.  Which one of them was carrying it?"

Perception: 12

As Grugga stands frozen in front of the elven necromancer, his companions finish the fight for him.  When the necromancer collapses before him, Grugga clears his throat awkwardly and stows his axe. He kneels and casts Spare the Dying on the necromancer and the owl-man, just in case they need it. "Be elsewhere tonight, Reaper" he murmurs under his breath and he tosses a copper coin over his shoulder for each of them. They're still unconscious, but in no danger of dying... yet.

When Dawntreader arrives, Grugga answers his question with a guess. "Probably this one" he says, rolling the own-man face up with his boot. "They called him a number... 'Thirteen'? No, I think it was 'Sixteen.' They wanted him to get home to the 'nest' because the 'mother' was depending on him. I don't know what it means, but you can ask them. These two are still alive."

Then Grugga kneels down and searches the two unconscious bodies next to him. He strips them of weapons and spell foci and anything else of worth he can find, putting it all in a pile out of reach. Anything that would be worse off wet, like a scroll or parchment or vellum, he  attempts to keep dry by putting between his armor and his shirt.
Investigation?: 17

Rohuzar stops to go take a look through bodies for the relic, starting with owl man. 
investigation 11 

perception for Dawntreader 23 

“Dawntreader… vhat is meaning of this? Strange owl creature, no? ‘Home’ and ‘nest’. I heard tell of bird recently in Bardstown. Do you know these?” 

Grugga feels a prickle run up his spine and his neck hair stands on end. The rain, already bothering him, suddenly feels much colder. "Bird-men in Bardstown... wasn't Malia abducted by a cult like this?" He looks up to the rain-filled sky, "If that's the case, then 'Mother' is who she was supposed to be sacrificed to."

Perception: 14

"Any chance this so called ‘Mother’ is that upstart necromancer you mentioned earlier? If so, would you mind elaborating on her? I do believe we have attracted her ire with our actions today."

Aubrey staggers forward, his flesh badly charred by the eldritch magic. He slumps down by a tree, his breathing strained. "Good job everyone." He says weakly.

Rohuzar moves to Aubrey. “Citizen Goldentide, you are looking… not your best. May I help to wrap your burns?”