(Ok that works, but I have run the angles and you can't quite get H3 so I am switching your target to H4)

Tyris moves 30 feet and somehow sights a hobgoblin through the open secret door. He shoots at the hobgoblin, and the arrow pierces it's head. The hobgoblin (H4) sinks to the ground in front of the southern door dead.

Shadow and Alben are up 

Alben throws a firebolt H3. Attack: 6 Damage: 6

Shadow shoots his short bow at h3 16 

Damage 5 forgot sneak attack for ally nearby add 7 so total is 12

He continues concentration on the charm spell and holds the door open still

Both Alben's firebolt and Shadow's arrow misses the hobgoblin. 

Fellian makes a perception check to see in the northern hobgoblins and friendly 12, deciding they are he pops around the statue and fires his Shortbow at the remaining hobgoblin (H3) Attack: 12 Damage: 3, but misses due to the smoke in the air. He then darts back around the statue to provide cover. 

H3 moves to attack Oreus (Oreus gets an opportunity attack due to his feat) with his Longsword Attack: 17 Damage: 8. Surprised by Oreus attack he drops his Longsword. 

Oreus make your opportunity attack 

If the Oreus, Tyris, Rellahne, Ollie are up 

Attack: 21 Damage: 6

Re rolling damage 11

Oreus is able to kill the hobgoblin before it could attack him 

I'm going to keep you in initiative at least until this round is finished, maybe one or two rounds after that, to see what you do with the 2 charmed Hobgoblins 

Oreus, Tyris, Rellahne, snd Ollie are up 

Oreus, transfigured by the wrath, turns the remaining opponent 

Attack: 13 Damage: 11

Bonus Attack: 10 Damage: 7

Re rolling all the damages because of fighting style 

Crit damage 9

Bonus damage 6

Tyris moves to the doorway to see the rest of the room.  Seeing two more hobgoblins to the north, he starts to raise his bow again for another shot, but notices they don't seem to be attacking the group and hesitates while he tries to grasp the situation.

Perception on the hobgoblins: 17

Rellahne had heard, and possibly seen, Shadow casting a charming spell, so once the two that were clearly more aggressive were down, she turns to look at the remaining two and gauge at how necessary it was to act.

Perception 8

She remains uncertain, so her instinct is to start preparing a cantrip to cast just in case.

(I was going to do it, ready a spell that is, but I just wasted my action, so next turn, maybe, unless something changes.)

Oreus who are you attacking? Both of the southern hobgoblins are down, are you moving to attack the northern pair?

Tyris make another perception roll, all perception checks have disadvantage due to the smoke making the room lightly obscured

Is Ollie going to do something with the potion?

Sorry, Oreus just gets 15 feet from the charmed ones

For Ollie's action, the owl is simply commanded to come back to Rellahne and give back the potion. The result of the quick dispatching of the two hobgoblins meant backing off of the original idea.

Waiting for Tyris to make another Perception roll for disadvantage 

Perception: 15

(Sorry everyone, I have been really busy with medical stuff the last few days and I've been really wiped out afterwards)

Tyris is able to determine that the northern Hobgoblins are Charmed and pose no immediate threat. 

I am taking you out of initiative unless someone attacks the two remaining Hobgoblins. Because you didn't kill the northern Hobgoblins, I'm only going to give you half XP for them, in case you need to (or decide to) later. 

Everyone receives 42 XP.

What do you want to do?

Edit:

Oops, I forgot Fario was still Unconscious, here are his dead saves unless someone stabilizes or heals him 

DS1 7

DS 2 10

DS 3 13

DS 4 17

If no one heals him in 4 rounds he stabilizes. 

Stable creature:

 Fario will regain 1 Hit Point in 4 hours. 

Day 4? Time since last Long Rest 3 hour 35 minutes. 10:35am

Alben: Hit Points 23/23: First level spells 1/4; Second level spells 1/2; Font of Magic (Sorcery Points) 0/3; Wand of Cure Wounds 0/7; Wand of Secrets 1/3; Hit Dice 0/3

Fario: Hit Points 7/22: Second Wind 1/1; Hit Dice Rogue 0/2, Fighter 0/1

Fellian: Hit Points 21/21: First level spells 2/2; War Priest10/2; Hit Dice Rogue 0/2, Cleric 0/1

Oreus: Hit Points 20/31: First level spells 1/3; Lay on Hands 1/15: Divine Sense 1/4; Sacred Oath 0/1; Wand of Burning Hands 0/7; Hit Dice 0/3

Rellahne: Hit Points 23/23, (Arcane Ward 9/9): First level spells 2/4; Second level spells 1/2; Arcane Recovery 0/1; Arcane Ward 1/1; Hit Dice 0/3

Shadow: Hit Points 16/24: First level spells 1/2; Devil's Tongue  1/1; Hit Dice 0/3

Tyris: Hit Points 10/28: First level spells 1/3; Hunter's Sence 0/3; Hit Dice 0/3

Oreus hands itches , eager to attack the hobgonli but he knows better, he leaves the others to talk with those monsters since he reckons he wouldn't help, actually the opposite.

SO he goes to take care of Fario, checking his wounds: 

He realises he forgot to buy a healer's kit, he will put it as a reminder for next purchases, he must try nonetheless

Fario, stay calm, don't move

Medicine 21

Rellahne, in her uncertainty about the last two hobgoblin's states of mind, starts getting ready to cast Ray of Frost, waiting for whenever she can see the two doing anything hostile towards them, or if any of the members of her party attack first.