You should have a +2 on the attack roll, you are proficient with Shortsword. 

(No, he had it right, but the wrong weapon. Connor has a rapier, not a shortsword. And flanking does not apply in the one shots. Otherwise bosses and mini bosses will be too easy.)

Humanoid One changes targets as it also focuses on Liliana.

Attack: 9 Damage: 8

(Forjar is up)

(Not sure if I can make it to melee this round...long week and I have lost track...If so use this...otherwise I will move up and Sacred Flame again)

Forjar moves up into melee with the closest of the fiends, bringing his hammer down in a large overhead swing.

Attack: 23 Damage: 9

(You came into the room so yes, you are into melee range.)

Connor pokes the human fiend with his rapier, getting the tip bloody as the rapier manages to break the tough skin. Forjar moves up to a fiend and brings down his hammer upon one of the Manes, pulverizing the fiend as it bursts into putrid gas instead of a bloody mess.

(And I am trying to kill Liliana but not going to bot her to be complete waste in the fight.)

Liliana drops her crossbow and draws her shortsword, attacking one of the Manes.

Sneak Attack: 13 Damage: 13

(And I just killed the last of my Manes, alright.)

Liliana manages to kill the last of the small fiends as it erupts in vapor, leaving only the two humanoid fiends.

Updated Initiative

1. Conner
2. Humanoid 1
3. Forjar
4. Liliana
5. Axon
6. Rusty
7. Humanoid 2
8. Hari

(Axon and Rusty are up.)

Axon switches arms now working the configuration of ports and levers once more, he could feel his internal temperature rising once more and then with that list twist of pliers, [Tooltip Not Found]!

Attack: 7 Damage: 4

Rusty moves in on Humanoid engaged with Liliana, having his dagger now in his off-hand. He attacks with his short sword, with sneak attack bonus as Humanoid #1 is engaged. 

Attack 26 Damage9

Two Weapon Attack Bonus with his dagger 16 Damage4

[ooc] I originally posted without the starting bracket on the bonus roll action, I edited to enter the bracket only.

Humanoid 2 strikes for Liliana once more

Attack: 20 Damage: 8

(And I'm not allowing death saves for Liliana.)

And with a fatal bite to the neck, Liliana falls to the wretch. The wretch gulps and opens his bloody maw, a long tongue coming forth, licking at the blood.

With an angry roar, Hari swings her blade at Humanoid 2 again.

Attack: 18 Damage: 3

Following up with Hari Conner plunges his blade into the same humanoid 

Attack21 

Damage 4

Even with both Hari and Connor sinking their swords into the fiend, it still stands.

Humanoid 1 turns its attention to the rest of the party, going for Forjar.

Attack: 19 Damage: 6

Forjar reels at the attack; the creatures claws viciously scraping into him.  He barely stays standing, and retaliates with a hammer strike of his own.

Attack: 20 Damage: 5

Forjar's blow is fatal as the creature stops moving before them, then starts to seizure as its body starts to combust, leaving only ashes as remains.

Only Humanoid 2 left. Axon and Rusty are up.

Axon switches arms once more, "I can do this all day" he said while building his internal pressure once more and then fires another Fire Bolt at the humanoid

Attack: 18 Damage: Unable to parse dice roll.

And as Axon fires the last blast of fire, the fiend burns down to ashes like the first. But along with an internal combustion to add to the flames already on it. 

Encounter Won

(And as the reward was already set, Liliana's share shall be split among the party now. So now each member of the party shall get 120 gold each.)

Rusty looks over the battlefield and sees their fallen party member. He knows the reduction in their force will make future encounters more difficult, but there is something else, something that he does not understand that makes this loss difficult to comprehend. He does not know of the expiration customs of Lilliana or his other companions. He waits for someone to to comment. 

Hari cleans her sword and sheathes it, face grim, but not grief-stricken. She grunts something briefly in Goblin before turning towards the rest of the chamber.

Goblin:

Her story was cut short let us all try and learn something from this I've learned resilience. solemnly  begins  searching for obsidian 

Investigaton 18