For the first time, the wight is visibly staggered by your attacks.

Zeph!

Zeph emerged from the shadows again, letting loose an arrow before ducking back into hiding.

Action: Attack with longbow (with advantage from Hide): 23 for 10 piercing damage.

Movement: From hiding spot 1 to hiding spot 2.

Bonus Action: Hide with Cunning Action. Stealth: 19

The arrow sinks deep into the wight but does not otherwise appear to harm it.

The wight launches itself at Zephiridon in an attempt to free itself from the meddlesome grappling hook.

Attack: 11 Damage: 8 (If this attack hits make a CON ST)

Zephiridon!

The once again grey tiefling sees the wight charging for him. "Damned undead! Burn in my hellfire!" he shouts as he uses his action to cast burning hands and as his bonus action rage yet again in such a way as to appear to be 'exploding' back into his demonic rage form. The wight (as well as anyone in a fifteen foot cone but zephiridon would try to put the 15 foot cone in a spot to hit only enemies or at the very least hit as few allies as possible) must make a DEX save of 11. On a failed save take 14 fire damage and half as much on a successful save.

(EDIT: I forgot the wight automatically fails Dexterity and Strength saves because it is Grappled.)

The wight tries to tear itself free of the barbed hook as it is engulfed in hellish flames. 

Zeuphis!

Zeuphis will continue the tried and true strategy of . . .sacred flame.

Damage: 6

The wight still stands but only barely.

Garazar!

With rage in his eyes, Garazar raises a hand toward the Wight and mutters an incantation.

He casts Guiding Bolt Attack: 9 Damage: 16

Bless: 2

The blast rips the wight free of the grappling hook and slams it into the ceiling. The twenty foot descent finishes it off.

200 XP each!

Garazar turns toward Zeuphis and speaks into his mind, "I think it's time we rest."

"Agreed."

Unfortunately, I’m going to have to leave this. Sorry.

That is going to present some problems. I'll see if we can make a substitution.

Zeuphis is enveloped in a glowing green sphere and in a blinding flash of green light a tiefling stumbles into the room. A substitution has just been made by your Gladiatorium manager.

A tan-skinned Tiefling with dark hair, pale white eyes, and two purple horns curling out of his forehead holds a shield and mace up warily. He wears full chainmail over rather drab common clothing and stares at the group with suspicion.

"I was told that I would have to kill to win this competition. Are you lot to be my first victims?"

His voice is higher pitched than you would expect from his bulky figure, standing at about six feet tall.

"No uh we just fought some zombies and a cooked a wight. Welcome to the best team." Zephiridon says

"You what? I don't—how—why—why would you cook a wight? Are you into that sort of thing?"

The Tiefling is no longer suspicious and is wholy bewildered. He sighs with a sort of resignation.

"Well, I suppose if I have to be with a team, it might as well be one named 'the best team', although I don't approve of your dietary choices. My name is Throst, I have been gifted with life giving magic by mortal divinity. What are your names?"

"We didn't eat it we just... tied it up and set it on fire many, many times" 

"Well met, Throst. Zephiridon Emeraldcrown, at your service" the grey tiefling bows genuinely, a rare sight indeed

"I suppose that would make more sense. A pleasure to meet you. What are your plans for the time being? Do you know of the locations of our competitors?"