Ran runs forward to get between Danica and the riderless bird-lizard.

He slashes out at it, striking for the head with one of his longswords. As soon as that blow is delivered he ducks down, looking to slash across a hopefully soft underbelly with his other longsword. 

Attack 1: Attack: 12 Damage: 11  

Attack 2: Attack: 11 Damage: 6  

Meili definitely had a reaction left in her and she used it on the running-away fiery amphibian:

AoO: Shortsword Attack: 18 Damage: 8

"That one runs for help!" Nalomanterys yells to alert his group to the danger. "Kill it now!"

Nalomanterys reckons that only one spell in his repertoire has the range to hit the fleeing newt now: he tries once again to send a lump of coal careening at its head.

Dex save DC 14 

Damage: 7 magic bludgeoning rolled in game log ((ignore first damage roll... i accidentally upcast it))

He stays where he is for now, hoping that the riders can't make it to him. He watches the fight around Danica and remembers something: "Danica has a healing potion in her backpack, Ran!"

Mica curses as he sees Danica go down “Cap’n!  Don’t worry, I got her.”  he shouts back to Nalomanterys and Ran.  Mica slides his longbow back in the quiver and moves up to Danica.  Placing a hand on her and one digging into the rocky soil of the cavern floor, he uses his connection to the primal spirits to cure wounds and restore a portion of her health.

(Restores 4 hp.).

Danica felt buoyant for a moment before a feeling of her childhood home floods Danica's senses, earthy stones beneath her feet, the smell of fresh green trees, the sounds of leaves...and suddenly she gasps to life, eyes wide and filled with adrenaline as they dart to take in what and who was around her. A hand grasps Mica's as she says a hurried, "Thank you." In Elvish to the Genasi and nodding in gratitude to Ran who stood defensively next to them. With a groan, she begins standing and gathering her shield and weapon. 

Danica spends her next turn getting up from being prone and making sure she didn't drop anything. 
((I think that's all I can do after being revived until NEXT turn. No bonus actions, right?))

[Danica, I can't find any rule stating you can't use bonus actions after waking from unconsciousness.  Not saying that isn't a thing... just that through 15 minutes of googling and flipping through my books I can't find it.  So as far as I am concerned, bonus actions are on the table.  If for Roleplay purposes you want to handle Danica as being too 'out of it' to do more this turn, that is understandable.

Please note the following:

• Make a death saving throw for last round.  While Mica's healing magic renders any successes or failures (even critical failures) moot, if you happen to roll a 20 you can take an extra hit point.
• The concentration on your entangle would have dropped when you passed out and the last of the firenewts is now free.]

With Danica's spell lost, the firenewt rider who had been restrained by vines rises to his feet and moves closer to the combat.

The two reptilian bird-beasts both appear gravely injured.  They focus their beak attacks on Ran who is doing his best to stand between them and Danica [who is still prone until her turn comes up].

Beak Attack: 10 Damage: 8

Beak Attack: 11 Damage: 6

The rider still mounted on the northernmost beast turns his scimitar on Hew.

Scimitar Attack: 21 Damage: 3

Scimitar Attack: 20 Damage: 2

This time the fleeing firenewt smelter doesn't see Nalomanterys' coal piece coming and it slams into it, nearly knocking it off its feet.  The creature survives, but barely, still limping toward the doorway.

Hew continues to assault the northernmost bird creature, then departs in pursuit of the fleeing firenewt.

Rapier Attack: 19 Damage: 6

Rapier Attack: 13 Damage: 9

Hew slays the northernmost monster.  It collapses, and its rider falls prone on top of the beast.

ROUND 3

1. Mica
2. Firenewt Riders and Mounts
3. Meili, Nalomanterys, Hew
4. Smelting Firenewt
5. Ran, Danica

Death Saving Throw: 6

In the dancing fires it was hard to see the picture clearly but shouting helped and the actions were clear. Danica was taken care of while the stubbornly alive newt was about to bring help. Meili made her choice and ran between two lava pools after the escaping newt.

Shortsword Attack: 18 Damage: 5
Unarmed Strike Attack: 7 Damage: 7

Just when it seems the fleeing firenewt smelter is about to evade his pursuers and reach the doorway to the next chamber, Meili darts between the smelters, ascends the ledge, and cuts him down with a shortsword strike.

[Both the smelters are down.  The two riders and one of the beasts are still up.]

Ran is up, then Danica's turn as posted previously, then Mica to start Round 4.

Ran grimaces as the first peck by the creature catches his shoulder, but he's able to get twist to the side and avoid the next beak attack. He lets the creature's momentum carry it a little closer, allowing Ran to reflexively get one of his swords up for a strike at the neck.

He then gets himself planted and slashes out at the neck again and then down across the legs. 

Reaction: Riposte (using a superiority dice to take advantage of the missed melee attack): Attack: 13 Damage: 9  plus 8  damage from Riposte  

Action: Attack 1: Attack: 13 Damage: 5  

Attack 2: Attack: 16 Damage: 12  

Ran counterattacks the monstrous lizard-bird, driving his sword up under its beak.  The creature pulls away but the motion turns into an arcing collapse and it drops dead.

[Assuming he redirects the rest of his violence toward the remaining riders, Ran may re-roll both of those attacks if he targets the prone rider of the beast Hew killed earlier in the round.]

Attack rolls on prone riser: 18  and 11  

As Danica begins to get to her feet, Mica moves past her and joins Ran next to the fallen rider.  Drawing his hand axe, he strikes downward, trying to end the firenewt before it can rise to resume its attack.

Attack: 18 Damage: 6 plus 1 colossus slayer damage.

.

Ran and Mica collaborate to dispatch the prone rider of the fallen monster.  

With all of its allies slain, the remaining rider [the one who had initially been restrained by Danica's vines] disengages from the action and flees to the west, back down the tunnel it and the other rider had previously come from.

ROUND 4

1. Mica
2. Firenewt Rider
3. Meili, Nalomanterys, Hew, Ran, Danica

Ran curses as the remaining rider makes a run for it. He drops his swords and pulls out his crossbow, quickly slipping a bolt into the action and firing off after the newt rider.

Light Crossbow: Attack: 11 Damage: 2  

Hew moves as quietly as he can past Meili and the dead smelter, towards the door.  You all notice that the sound of clanging hammers which once resounded throughout the halls has stopped....

...

...

Then it starts up again, the hammers ringing melodically through the ovenlike interior of the forge complex.

Nalomanterys has no time to ponder the ramifications of the stopping-and-starting hammers. He dashes west, hoping to cut off the fleeing rider before he can report anything to any of his kin.