(Assuming DEX Save of 20 saves and one of those failed rolls under DC 14 is the priest. If not, Kethra drags him over to a space where he'll need to save, but move herself to the safe space that the priest was in? Oh, and I forgot to mention, I rolled the DEX save at adv because of danger sense from being a barbarian.)

After an explosion of sound and a restraining magic, it's quiet for a moment until an angry burst: Sensing danger, Kethra had avoided the webbing by sliding past the priest's legs when he didn't expect it, then used the armored cultist as a wall to avoid the web. Moving her now-webbed enemy briefly to the side, Kethra's hooded silhouette peeks from behind to address the party.

"Hey! Watch it, Mr. T--er, Mr. Baker!"

Kethra pulls her grappled target in closer by the collar, to seemingly confide to the priest only to stomp on a part of his foot that isn't covered by webs. "Can you believe it? I totally forgot about nicknames! I should've told the new guys to get nicknames too..."

Unarmed strike to-hit (advantage because of web): 22 Damage: 4

Still firmly holding the priest by the collar, Kethra strikes the priest with her shield arm, using the the shield's weight to drive an elbow into his face. (Non lethal attacks if it drops him to zero HP, using the priest as half cover.)

Martial arts to-hit (advantage because of web): 20 Damage: 6

"Hey team! I forgot that we had planned to only talk to each other with nicknames whenever we fight these cults...secrecy and all that."

(The priest forgot to save: 3)

So there are two reavers and one priest left, but the priest isn't restrained? I'll redo my turn then:

Kethra will drag the priest over to one of the reavers, use the same attacks above to attack a restrained reaver instead (still non-lethal melee). If it drops the reaver to zero, she'll move herself out of the web BUT the priest is still starting his turn grappled and in the Web. If the reaver is still alive and kicking, Kethra will stay there keeping the priest so that he starts in the same condition but also beside his reaver ally so the Mr. Tyde can hit them both with the acid globs he's been chucking!

Rubin will continue shooting at any of the enemy, targetting restrained ones first...

To hit: 22 Damage: 6

To hit: 24 Damage: 8

Xanranzan changes tactics for a second, and instead barks something in draconic. Those that understood it would know it to be something very insulting, but also laced with a subtle magic that would do a little more than just hurt the feelings of a still living reaver...

Action: Cast Vicious Mockery(Wis 13) or take 3 Psychic Damage. At any still living reavers.

Dex save: 7

One more reaver goes down to Tyde’s acid.

Kethra bludgeons the last reaver into a blissful state of unconsciousness.

Rubin, please roll disadvantage for the priest’s blur since he’s the only remaining target.

Assuming Xan targets the priest instead, save: 5

(I rolled with advantage before, so can you mouseover those and see what the lowest roll was? If not here are two new rolls you can use if they are lower than the value shown before...) roll 1: 8 Roll 2: 15

Quote from DragonDenn >>

(I rolled with advantage before, so can you mouseover those and see what the lowest roll was? If not here are two new rolls you can use if they are lower than the value shown before...) roll 1: 27 Roll 2: 27

  Holy moly, that was an incredible waste of nat 20s...

(Well since the other rolls were over 20 they'll probably hit o7

Will the enemies be taking their turn or should I make my move like everyone else?)

(Right, didn't think about that *facepalm*.  RIP those crits.  Longer update later today.)

(In response to Kethra's sniped post—you made your turn for this round, I just have to post the priest's turn when I have time.  If he's still alive, which I also need to determine.)

(Priest has taken 43 damage.)

Concentrations: 6, 12, 20

Sorak looks to finish him off.

Attack: 18(Dis if applicable: 19) Damage: 10

Sorak lops off the priest's head with a single mighty blow (unless the party would have preferred to keep him alive, in which case he clubs him into unconsciousness).

Quote from BizarreBalthazar >>

He introduces himself, "Many thanks! Sorak Darkblade am I. In your debt am I, friends. Saddened to hear you say the reavers are slain. They have affronted my honor. I wished to discuss this with them."

(Kethra is totally fine with Sorak getting the leader kill and will flash him a smile and a thumbs up.)

(Just wanted to make sure my bottling of him wasn’t screwing up any plans.)

( I'm sorry but I'm just picturing Kethra holding in place the very beat up looking priest in place and Sorak in front with his sword high and ready to strike the cultist down. But then they both stop and look over to the rest of you guys for approval xD )

(If one of the other Reavers is still alive but knocked unconscious then that's fine. If not..)

Xanranzan looks as if he's about to nod as well only to hold up his hands. "N-now just h-hold on a sec! Don't we need that one to find out where our stuff is, and/or where those other hostages are you folk were talk'n bout before?" He looks to the other reavers half-hopeful one of them was at least still alive. "If not, uh, do what you do then." 

There’s an unconscious reaver.

The priest snarls in defiance and begins mouthing a spell, but Sorak's blade separates his head from his body long before he can finish it.

"Is your gear in there?" Rubin asks from outside the chamber, as he keeps watch.

Sorak rummages around in the various belonging chests, and eventually finds their missing gear mixed in with the priest's personal belongings.

"We won! But sheeeesh, you didn't have to get me involved in the mess though..."

Although the pale-eyed girl tried to hide it, she was a bit miffed that Sorak would go for such a high-pressure artery like the carotid (in the neck) while she had already gone to the trouble of being so close of holding the priest down. And she seemed to be particularly defensive about her hood getting dirty. But as soon as she realized that she made that comment sound a lot more sarcastic than she meant to be, she moves to wipe the blood off her face with her cloak to hide her own face turning red.

"Um! I mean, I'm not new to this! It wasn't the first time I got a lot of blood on me! There was the time we fought an ogrillion and...um, wait, that was my own blood...and when we fought Jolliver...wait, he was somehow immune to physical weapons until we killed him killed him..." as she Kethra nervously tries to save face but keeps making a bigger mess in more ways than one, her sleeve catches a piece of the dissolving Web spell and she accidentally pulls down her own hood.

This action reveals to Xanranzan and Sorak that the young human girl has a head of white hair tied back hidden underneath, similar to an old woman on the last days of her life. Realizing what just happened, Kethra turns a more deeper shade of red from embarrassment.