Luther quietly shoulders his shield, sheathes his rapier and draws his longbow.  He sneaks forward until he can cover the others from distance.

Stealth 26 

Thariv tries to sneak up quietly, stopping not too far from Luther, ready to do some long-distance blasting when needed.

Stealth 12

Now that Thariv has pointed them out, you count four skeletons atop the two huts closest to the far bridge end. Luther takes cover behind a rock formation neard the ledge, Thariv tries to blend with the cave wall and Ufeza stays near the tunnel entrance, all three ready to attack. Zephyra dashes forward across the bridge and reaches the nearest 10 feet tall hut, as she touches the wall to start the climb the skeletons notice her and draw longbows.

Time to roll for initiative!

Skeletons: 14

Luther initiative 15 

On his turn, Luther will fire his longbow at the northernmost skeleton:

Attack: 12 Damage: 5 piercing

Initiative: 13

on his turn, Ufeza will shoot at the skeleton nearest Zephyra. He will move if this is necessary. And remaining movement will be made towards cover, preceding to move closer if there’s cover either direction.

Attack: 14 Damage: 12

Zephyra's initiative 6

Misjudging the porousness of the hut's walls, Panther-Zephyra scrambles to maintain her grasp on the worn structure giving herself away but continues to climb quickly to get within range to slash at the closest with a claw.  

Claw Attack: 6 Damage: 5

@DM  

Thariv Initiative 22

Thariv sends a blast of dark power at the southernmost skeleton trying to knock it back to give panther Zephyra some breathing room. Or even knock it off the hut if possible. 

Eldritch Blast Attack: 8 Damage: 14
Repelling Blast to knock the skeleton 10 feet straight back

Arrows fly, hitting two skeletons. The black panther climbs to the top of the hut and finishes off one of the damaged ones as  a blast from Thariv illuminates the cavern.

The undead retaliate, the one near Zephyra using its longbow as an improvised club:
Attack: 6 Damage: 5

And the other two shooting across the bridge:
Attack: 5 Damage: 5 against Thariv.
Attack: 24 Damage: 8 against Ufeza.

Initiative order:
15 Luther
13 Ufeza
10 Panther Zephyra (7)
10 Thariv (6)
  8 Three skeletons (8)

Luther goes next.
 
OOC: the panther can use Bite or Claw against any enemy. The pounce lets you use both, the Claw as an action and the Bite as a bonus action if the foe is knocked prone.

(@Seldim - thank you for sorting that out.)

On her turn...

Panther-Zephyra snarls in pain and moves in for a bony meal if it remains upright.  Bite Attack: 11 Damage: 8   

Ufeza sees the skeleton loose an arrow in his direction and sidesteps quickly as the arrow clatters against the wall behind him. Seeing Panther-Zephyra engaged with the lone skeleton at that roof, he decides that a skeleton wielding a bow as a club is basically a large if annoying chew toy for a panther, and reloads and fires at the wounded skeleton on the other rooftop.

Attack: 7 Damage: Unable to parse dice roll.

If the skeleton fighting Zephyra is still "alive," Thariv fires an eldritch blast at it. If not, he targets one of the skeletons still standing to the north. 

Eldritch Blast Attack: 15 Damage: 6

Luther fires at the northernmost skeleton again, trying to put it down:

Longbow Attack: 12 Damage: 5 piercing

Luther's arrow cracks the spine of the northernmost skeleton, making if fall in pieces from the roof it was standing on, while Ufeza puts an arrow on the remaining skeleton on the north roof. Zephyra easily bites the undead in front of her, and a blast from Thariv hits the same skeleton, leaving just barely standing.

As the eldritch blast moves, you notice three solid shadows moving. Two of them are crossing the bridge towards Thariv, Luther and Ufeza, while the last one is gliding towards Zephyra.

Initiative order:
15 Luther
13 Ufeza
10 Panther Zephyra (7)
10 Thariv (6)
  8 Two skeletons (6) (11, in melee with Zephyra)
  7 Three shadows

Luther goes next.

OOC: had to format my computer, I'm back :)

Seeing the shadows approaching, Luther quickly assesses the risk profile and decides that he needs to stop them advancing any further.  He drops his longbow and equips his shield (as an action), then advances to melee range with the nearest shadow,.

Drawing on his experience and speed, the half orc jabs with his rapier at the ghostly opponent (Action Surge to take another action - attack).

Rapier  Attack: 25 Damage: 10  

Luther's attack hits the shadow, but doesn't seem as effective against it as against other enemies.

Initiative order:
15 Luther
13 Ufeza
10 Panther Zephyra (7)
10 Thariv (6)
  8 Two skeletons (6) (11, in melee with Zephyra)
  7 Three shadows

Ufeza goes next.

@DM question in OOC

Ufeza fires a bolt at the wounded skeleton on the right rooftop. As he reloads he shouts to Luther, "Stay on your toes and you can handle whatever these shadows have up their nebulous sleeves!"

Action: Attack: 12 Damage: 9

Bonus action: Bardic Inspiration to Luther — As a bonus action, a creature (other than yourself) within 60 ft. that can hear you gains an inspiration die (1d6). For 10 minutes, the creature can add it to one ability check, attack roll, or saving throw. This can be added after seeing the roll, but before knowing the outcome.

Ufeza's bolt easily finds the undead on the roof, leaving it at the brink of shattering into splinters.

Initiative order:
15 Luther (bardic inspiration available)
13 Ufeza
10 Panther Zephyra (7)
10 Thariv (6)
  8 Two skeletons (12) (11, in melee with Zephyra)
  7 Three shadows

Zephyra goes next.