Free The Fallen, actual game.

Fine I'll just use your original attack, Tarathi's turn.

Tarathi fires at the buff kobold seeing it as the greater danger. 

16 to hit 10 damage

Pushed 10 ft away. 

Hit, Caelar's turn.

Per the previous fight, Caelar should get an opportunity attack on the buff kobold, since it was pushed out of melee range.

Opp. attack on buff kobold: 19 to hit, 19 damage.

Both of the other kobolds are likely still within melee range, which means he will attempt to hit one and cleave the other.

Reckless attack on either of the others: 13 to hit, 10 damage

If that hit, using Cleave to attack the other: 26 to hit, 15 damage

The other two have the prone condition so you have advantage.

Quote from YukiNatsuki >>

The other two have the prone condition so you have advantage.

 (In that case I don't use reckless attack... but those rolls were already with advantage. So if I missed the first prone one, I don't get the final attack.)

You missed the first attack.

The two prone kobolds get up, Topp uses Toll the Dead on Dagna, WIS DC 14 or take 9 psychic damage.

Meedul punches Caelar twice, 6 for 8 damage, and 14 for 8 damage.

Botum attacks Magnus with his greatsword, 9 for 13 damage

Magnus's turn.

Dagna Wis save 7: Recording 9 damage

That was her best save, the only one she's actually good at and she still missed.

I'm confused about 9 damage from Toll the Dead. That's a spell Dagna has as well, and against an undamaged opponent (Dagma was undamaged before this), it does 1d8 necrotic. So how is she taking 9 damage?

He attacks whichever one is the least wounded

Hit:18 damage:11+7

(Sorry about the Toll the Dead, remove 4 damage from it and only take 5.)

(One is damaged so Topp or Meedul?)

Quote from YukiNatsuki >>

You missed the first attack.

The two prone kobolds get up, Topp uses Toll the Dead on Dagna, WIS DC 14 or take 9 psychic damage.

Meedul punches Caelar twice, 6 for 8 damage, and 14 for 8 damage.

Botum attacks Magnus with his greatsword, 9 for 13 damage

 Meedul's first punch swings wide, the second hits Caelar's armor with a clang. Without flinching, Caelar remarks, "That sounded like it hurt."