(If I can't use acid splash like that, I had a vial of acid and I would have picked some more up from Falish's, the only reason I didn't was because I was my own vial of acid) 

You can use acid splash on the grate, yes

Once it is open, Turf (who has darkvison) walks in and looks for tracks (survival 14) 

A circular maintenance shaft plunges down into the darkness. An iron ladder is bolted to one side of the shaft. The pungent smell of the sewers wafts up to your nose. A faint light is visible at the bottom, illuminating refuse-filled water.

You stand shin-deep in sewer water, in a dimly lit tunnel. There’s a raised walkway on either side that gets you out of the smelly, muck-filled water. Small lamps housing magical flames shed dim light. The walls are covered in moss and lichen 10

Turf appreciates the tunnel, in fact he prefers the moss covered walls to the mechanical monstrosity (though a sometimes useful monstrosity) named Slag. As he walks along he druidcrafts to attempt to spread some moss onto Slag 

Slags eyes glow brightly in the dark.. casting light a short distance in front of him. The warforged would stop a moment as the stench hit him before simply stopped breathing and continued on. Noticing the moss, he would take his thin metalic fingers and pull a chunk from the wall and look at it before tossing it into the water. "Well this place seems great...Thankfully I don't need to break so at least I can avoid the smell..." Slag would mention to the others. Noticing the moss seemingly begin growing on his arm at an alarming rate, flame would erupt from his fingertips after a short hissing sound and a small spark as he cast produce flame. Quickly burning away the moss he would turn to his companions once more. "Perhaps we should move quickly... I might need to eradicate all of this growth though.. it seems to spread pretty fast.." He would say as he holds the flame close to the moss covered wall...

As you go through you encounter a Gray Ooze! Please roll for initiative and on the same post say your action and roll damage at the same time as attack

Initiative: 4

Action: Throw Dart: Attack: 17 Damage: 3.

Movement: move away from the slime 20 feet.

Turf yells (before noticing) "Don't you dare eradicate this, I was trying to improve you!"

Initiative: 10

Action: chaos bolt:Attack: 14 Damage: 17 psychic damage

Wild magic check: 17 (Safe)

 (movement is to climb the ladder and glide off, because these wings want to glide sometimes (gliding is 2ft forwards for each ft down)

Initiative: 7

Longbow Attack: 10 Damage: 6

Erathas quickly moves back 30 ft and flips his hair knowing his aim was true

That's pretty badass I must say! We waitin' for 2 more

"I will handle my own upgrades!" Slag would snap back before chucking the ball of flame in his hands towards the gray ooze.

Initiative 9
produce flame Attack: 20 Damage: 1

(this thing is dead right? The question is does it get a turn before it died) 

Correct, it died

You emerge from the sewers at an alley near an old warehouse

Ealoth pulls the dart from the mass of goo as he passes it. "That was interesting. We should keep moving. I don't want to see more of that." Climbing out of the sewer, Ealoth takes a moment to stretch and appreciate the open air again. He then looks around hoping to find any clues as to where the convict could have went. 

(knowing the ooze, you haven't got a dart to recover) 

Correct, it melted the dart

Erathas walks past the pile of goo at this point and cocks his head, much like dogs do when you're talking or showing them something. Well, you don't see that everyday.

Turf looks around and decides to let the others take the lead here, he is happy to talk to people but doesn't want to attract the wrong attention