Mark shoots an arrow at Troll 3 but the arrow flies wide. Zoveldra moves in just as the two trolls attempt to shove the Snake down a pit in the corner of the cave they’re in:

Snake DC 15 STR save with disadvantage due to being pushed by two trolls: 6

The two trolls push the snake down the pit and Erix feels that the beast has fallen a VERY long way before dissipating. 

You all are up. The two trolls turn around to face their attackers. “For the Topknots!”

*LANDMOP moves up to the next closest troll, Halfling the healing seems to be working*

Attack: 8 Damage: 13

LANDMOP's attack misses the Troll.

Zoveldra, Elero, Erix, and Mark can all still go. Zoveldra and LANDMOP are in melee with the Trolls.

Elero will hang back out of melee range, and use his Arcane Firearm to cast Scorching Ray at 2nd level at the troll who seems to be the most injured, or at Troll 1 if he can't tell the difference.

Three spell attack rolls: 11 to hit, 9 to hit and 25 to hit

Looks like only one hit, and he'll add his Arcane Firearm d8 to the damage, for 5 plus 7 fire damage to the troll.  Elero will frown at the contraption and ponder what modifications he could make after this battle to improve its accuracy.

As as bonus action, the Protector Cannon will move to within ten feet of the party members in melee with the trolls and pulse out 4 temp HP of shielding.

Erix pulls out another fuzzy ball which turns into a Panther this time
The badger moves towards Troll 3 as well as the Panther

The Panther attacks: to hit 19 for 9 dmg after which it uses it's BA to disengage and move 20ft away.
The badger does the help action to give advantage on Mark's next attack.

Elero does fire damage to Troll 3, causing it's fur to burn away, it won't heal this round. Erix' Panther does some damage to the same troll and backs away while the badger distracts the increasingly angry Troll. Mark's bolt slams into it, while Zoveldra steps forward and lands three firm punches into the Troll. 

The Troll's lash out. Troll 3 attacks the Badger, then Zoveldra, while Troll 4 attacks LANDMOP

Rend against Badger Attack: 24 Damage: 13 Slashing

Rend against Badger Attack: 25 Damage: 12 Slashing

Rend against Zoveldra Attack: 20 Damage: 12 Slashing

Rend against LANDMOP Attack: 9 Damage: 10 Slashing

Rend against LANDMOP Attack: 10 Damage: 9 Slashing

Rend against LANDMOP Attack: 27 Damage: 23 Slashing

You all are up. The two remaining Troll guards are cornered in their room with the bottomless pit, but they are fighting ferociously.

LANDMOP will attack troll 4 with a Vampiric Touch

Attack: 18 Damage: 14 and LANDMOP heals for 7

"No." She tells the troll flatly

Erix moves between LANDMOP and Zoveldra after which he cast Thunderwave to try and push the two trolls into the hole the snake fell in:

DC16 con save or take 13 Thunderdamage (half on success) and be pushed 10ft back.

The Panther will bite one of the trolls of still standing after which it disengages and moves away again:
to hit 16 for 9 dmg

Deflect attack on Rend: -19 damage

Zoveldra deflects Troll 3's swipe and then keeps attacking, also trying to knock it into the pit (or Troll 4 if 3 dies).

Action: Unarmed Strike to hit 24, damage 11

Extra Attack: Unarmed Strike to hit nat 20+8, damage 11

Bonus Action: flurry of Blows Push (DC 14 strength or pushed back 15 feet). Attack 1 to hit nat 1+8. Attack 2 to hit 15, damage 8

If any of them are still standing, Elero will shoot his crossbow at the most-injured troll.

Light crossbow attack: 12 to hit and 8 damage

The Protector Cannon pulses out 7 temp HP of shielding.

As an incidental, Elero will shout in Giant, "If you surrender, we'll let you live."

Troll 1 CON Save: 6

Troll 2 CON Save: 13

Troll 4 STR Save: 10

Troll 4 whimpers for a moment as LANDMOP lays their hand on it, and is immediately blown backwards by Erix, bouncing into Troll 3 as it trips and falls into the hole behind, screaming as it falls into the abyss. Zoveldra then steps forward, her hits pushing the last Troll into the hole as well. Elero goes to shoot the Troll but they're all gone, the initial battle is over.

As the rush of blood settles out of your ears, a new sound comes up from the caverns around you. Troll's screaming and holering at each other in their brutish language. From the cavern to the east, you hear the distant sounds of troll's saying "The Topknots are under attack! Good! finally the Slaverer's will rule and WE will control the entrance to our caves!" From the cavern to the south you hear a female Troll voice yell in crazed determination, "Come, attackers! Met me, Greezelet, and feel the full wrath of vengeful Zartarxis!" There's also a cavern to the west, but no sound comes from there at the moment.

So will you head east toward the Slaverer's, south to meet Greezelet in battle, or check out what's west?