Unsure of his ability to fight off the dragon-priest's strong paralysis spell (and having had a premonition of such), Sekkar is relieved with Rhayna arrives with divine intervention. Movement restored once more, Sekkar bares his teeth and twirls his radiant sword at Gartokkar, finally running him through and then stepping in and tearing the dwarf's throat out with his teeth. Thus endeth the high priest of the cult of Themberchaud, and no doubt the last shred of hope of controlling the red dragon.

The Stone Guard are too well trained to back down after the felling of another dwarf, and they battle fiercely, working together in military precision in their attempt to subdue the feared ranger.

Stone Guard 1: Attack: 22 Damage: 5
Stone Guard 2: Attack: 26 Damage: 7

Kaylyn/Pensive and Pax up now.

MAP update

Kaylyn, with the help of Pensive, refocuses her attention on Gartokkar and fires off at him again.

Attack: 28 Damage: 12

Attack: 23 Damage: 15

As a bonus action she says to Pax "May your blade be true." as she bestows Bardic Inspiration on her.

(Gartokkar was supposed to be dead, but on the map he is alive?)

(No, he is the top right with the cross through him.)

(Good, I though I mixed up something again. But then Kaylyn need another target?)

Pax, with the combat almost over before she realized there was a fight, blushes fiercely, embarrassed, and looks for the nearest enemy.  Ahhh, a priest just behind her.  She steps up to him, her sword out, but instead reaches to grab his shoulder with her hand, electricity dancing along her fingertips.  Attack: 12 Damage: 14. (is he wearing metal armor, if not, then just get rid of that advantage I gave myself....)

((It appears I misread the map and missed that Gartokkar was dead,  Kaylyn will fire at Priest 4 straight east of her.))

Kaylyn's spell blasts the dwarf priest backward, slamming him against the cavern wall where he slumps lifeless. Pax's electric grip is swatted away by another dwarf, and zaps harmlessly to his side. The priest responds by drawing an aura of protection around himself, and then calling down a pillar of flame above Pax's head

Pax: DC 12 DEX save or 5 radiant damage

The two dwarves that were fried by Kastix turn and charge at him, extending their hands in an attempt to cause magic wounds in the tiefling.
Attack: 21 Damage: 11 necrotic
Attack: 5 Damage: 23 necrotic

The two nearby drow also witnessed the fiery display, and see Kastix as an easier target than the elusive Zeno, so they fire at Kastix with their crossbows.
Attack: 21 Damage: 6
Attack: 15 Damage: 4
Any attack that hits, make a DC 15 CON save or be poisoned for 1 hour. If a save fails by more than 5, Kastix is unconscious.

The third drow likewise spots and fires at Kaylyn
Attack: 12 Damage: 8
Any attack that hits, make a DC 15 CON save or be poisoned for 1 hour. If a save fails by more than 5, Kaylyn is unconscious.

The fourth drow (the leader) also looks for an easier target, draws a shortsword and charges at Pax. Those who understand Elvish (sorry Sekkar/Kastix) hear it yell something about 'killing the spare', but capturing the others.
Attack: 13 Damage: 7 + 11 poison
Attack: 8 Damage: 7 + 9 poison

MAP: 

Back to Kastix/Rhayna/Sekkar/Zeno 

Zeno fires off another shot, this time at Priest 3.

Attack: 27 Damage: 10

Sneak Attack: 9

Sneak Attack Critical Damage: 6

Then Kastix senses something behind him, as, emerging from the darkness, the hooded fiigure of Zeno stands with blade drawn, back to back with Kastix. (Stow crossbow, draw rapier when I can)

Kastix takes a step away from priest 2 while staying in range of Priest 3 then cast Fireball using staff of Fire to try and get priests and drow in the blast

Dex Save: 16

Damage: 27

Using metamagic Empowered Spell to reroll 1,2,2,3

Revised 30

Sekkar continues to fight the guards now:

Attack1: 16 Damage: 11

Attack2: 21 Damage: 17

Though, to even the odds a bit adds Healing Spirit for 6 on his spot, calling forth a transparent snake coiling around him.

(If one guard is dead - attack another)

Pax dex : 15

Pax growls at the drow before her, and casts a spell. (Armor of Agathys at 2nd level). Inky transparent blackness crawls up Pax's legs and around her body, a cold frost steaming away from her body. 

Rhayna takes another bead from the necklace. This time, she casts Bless on Sekkar, Kaylyn, and Pax.

Rhayna will move closer to Kastix, using her full movement. (End up NE of Kastix?)

(Hope Sekkar can handle two guards.)

CON save 18

I figured out a way to include Drow 9/10 and Priest 2 in a 20' radius, and narrowly avoid both Kastix and Zeno, but it puts Kastix just NE of Priest 3. Same effect as described, but slightly different position. Can't post a map until later. Not even gonna bother with DEX saves, they are toast.

Priest #2 OA on Kastix: Attack: 21, Damage:6

Kastix moves to the edge of the sunlight, risking a swing from dwarven war pick of one dwarven priest in order to circle around the other. Holding out his staff, Kastix releases a mighty explosion in the tunnel which engulfs two of the drow and the same priest that swung the pick at him. The burnt body of the drow furthest back in the tunnel is in fact blown right across to the other wall. The two duergar guards seem shocked by the explosion but disciplined enough to fight on. The remaining two priests also seem shocked but perhaps more accustomed to fire. The two remaining drow however seem ready to flee.

Kastix turns to face the priest beside him only to see a crossbow bolt pierce the dwarf's neck, and it drops to the floor in a gout of blood. Zeno strides out of the darkness to stand beside Kastix, stowing his crossbow with a grin of satisfaction. Rhayna also backs toward the pair as she holds up her amulet and calls down a blessing upon the three companions still engaged in battle.

Back in control of the fight, Sekkar battles the two guards together. Despite their military training, they cannot match the lizardman for skill, and one is run through and then nearly decapitated as Dawnbringer rejoices exultantly in Sekkar's mind. The glowing snake conjured by the ranger curls around his waist like a belt.

Stone Guard #8 v Sekkar. Attack: 22, Damage: 9

The remaining guard is disciplined enough not to flee from the battle, and fights on hoping for a lucky hit. The other remaining priest beside Pax and Kaylyn seems too fanatically invested to quit, but the drow leader looks ready to make a tactical withdrawal.

Kaylyn/Pensive next. Pax can change your action if you want.
Only one stone guard left on Sekkar, one priest and one drow on Pax/Kaylyn, and another drow further back in the darkness.

Pax stays her same action. I thought I couldn't see the drow leader, since he was semi-transparent on the map.  Either way, fine with this action for now. She casts her protective spell. 

Pensive, I will not go with this drow Kaylyn says to the pseudodragon in her mind as Pensive focuses his crazed emotions on the poor drow in order to Help her.  Kaylyn, with a soft word, is suddenly briefly surrounded by silvery mist and then teleports away and appears to the left of Rhayna (BA - Misty Step).  She then fires two bolts of Eldritch Energy at the Drow that she was just next to.

Attack: 24 Damage: 11

Attack: 23 Damage: 12

The drow turns its head to look down the tunnel for an escape path, and doesn't even see the two blasts of magic energy from Kaylyn as they slam into it, knocking it unmoving to the floor. The other drow is already in full flight, and sprints off into the darkness toward the south. The dwarf priest beside Pax seems to be in a fervor of battle and continues to fight on, swinging with its war pick at Pax as a magical glowing mace appears on the other side.

War Pick v Pax: Attack: 19 Damage: 7

Spiritual Weapon v Pax: Attack: 7 Damage: 9

Back to Kastix/Rhayna/Sekkar/Zeno. One dwarf Stone Guard remains in melee with Sekkar and one dwarf priest in melee with Pax. The fleeing drow is 100' south of Pax.

(As bad as anyone's rolls have been, mine were the worst in this combat I'm sure of it)

MAP

The guard chose his fate:

Attack1: 29 Damage: 11

Attack2: 28 Damage: 11

(takes another heal from the spirit)