What are they armed with? If Dog doesn't see a ranged weapon on them ready to throw at him, he'll ready his action to attack the first one who gets within melee range.

Attack: 22 Damage: 9
Extra Attack: 29 Damage: 17

(Rolled with advantage in case Dog gets advantage on berserker/frenzy/barbarian shenanigans. If no advantage, take the first roll of course!)

He tries to set his back against the horse he's walking next to, to guard his flank.

If he sees them hefting javelins etc he will move to #3 and attack.

Tock sees them being spread out, takes out his Wand of Wonder and targets number 7.

Wand roll: 74 - casting Faerie Fire, DC 15 dex save.

He then runs around the carriage to the south side.

Stones moves to E12 with a flourish and growl at this new threat and swipes with his scimitars once, twice, three times (2 attacks plus bonus) at BBY8.

Attack: 21 Damage: 8 

Attack: 26 Damage: 5

Attack: 24 Damage: 9

“Uh oh. More of these ugly idiots. Try and hit me.”

Gash casts Mirror Image and pop pop pop 3 more Gashs appear. 

(Time for the wolf army!)

Keyrie uses conjure animals to summon 8 wolves, and use her bonus action to cast magic stone.

(They are armed with greataxes)

Stones lands three quick strikes on his opponent, who flinches and then growls at him in response.

DEX(15) for B7: 10

B7 takes on an otherworldly glow.

DM shield:

Bugbear berserkers 2, 3, 5, 6, 8, and 10 all roar simultaneously with rage and charge with abandon. The others move forward with expected caution.

B1 charges up to Tock and slashes at him with his greataxe: Attack: 7 Damage: 13 (miss!)

B2 charges at (2) Dog, who hits him first with two rapid blows. The berserker attacks in return recklessly. Attack: 23 Damage: 8 (hit!)

B3 charges at Dog, attacking him recklessly. Attack: 25 Damage: 6 (miss!)

B4 charges at Gash and his duplicates, not making it in time to attack.

B5  charges at Dog, also not quite reaching him in time to attack.

B6 charges at Keyrie, swiping at a wolf recklessly.  Attack: 22 Damage: 8  (dead!)

B7, glowing a soft blue, charges at Stones, attacking with his greataxe.  Attack: 11 Damage: 8 (hit!)

B8 attacks Stones as well, but with a reckless rage.  Attack: 22 Damage: 11 (hit!) 

B9 charges towards the fray, not making it to anyone.

B0 charges into the fray as well, arriving at Stones, with his axe ready raised high. But he is too late. The tabaxi crumples under the blows of the berserkers.

Bulwark is up!

Bulwark will, seeing his group be beset again, rage toward B9 and swing at him recklessly with his warhammer, bringing his shield up to defend against retaliation.

Attack:  Attack: 16 Damage: 13

He'll then use his bonus action to heal with his Second Wind: 10

However on seeing his new ally fall unconscious, he'll run as much as he can towards the bugbears surrounding Stones, and try and protect his unconscious form from attacks (He'll try and position himself over Stones).

Bulwark lands a solid blow, then skates around B9 without breaking away from combat range.

(Everyone else may go in any order.)

Gash ignores the berserker closing in on him and orders friend to fly to Bulwark but stay in the sky. Gash then shoots a fire bolt at B0. 

Attack: 14 Damage: 12

Gash's bolt sears through the marsh, missing its target completely.

Dog uses his reaction to cast the force cantrip, with the effect of that shimmering globe (that boosts his 20 AC by 1, turning that 20 hit into a miss).

He roars back at the berzerkers, his eyes flaring in anger. He attacks B2 with his normal attack action and also uses an action surge on the same one, unless it drops in which case he'll turn to B3 for the remaining ones. 

(I think that some of the attacks will be at advantage thanks to berzerking hijinx, so I'll roll that way, but if I'm wrong, just take the first roll!)

Attack: 12 Damage: 13
Extra Attack: 23 Damage: 14
Action Surge Attack: 24 Damage: 8
Action Surge Extra Attack: 28 Damage: 8

Four rapid blows crack the berserker's ribs, collarbone, and skull. He wobbles, but doesn't fall. He shakes his head and roars back at Dog.

(OOC: Meep.)

"Lets hunt them down Myon!"

3 wolves on Bugbear 9
Wolf One Attack: 14 Damage: 7
Wolf Two Attack: 11 Damage: 10
Wolf Three Attack: 20 Damage: 8

3 Wolves Keyrie and Myon on Bugbear 6
Wolf Four Attack: 18 Damage: 9
Wolf Five Attack: 20 Damage: 8
Wolf Six Attack: 20 Damage: 8
Keyrie Attack: 19 Damage: 6
Myon Pounce (dc 13 strength) Attack: 17 Damage: 12
Myon Bite Bonus action if Prone Attack: 17 Damage: 8

 (I accidentally left one wolf off the map. I'll have him attack B9: Attack: 20 Damage: 7)

 B6 STR(13) check: 18

All four wolves bite at B9, although it doesn't fall.

Myon, Keyrie, and one wolf land hits against B6, who also stands strong against the attacks.

(Tock and Stones, who can only roll a death save unless Tock can heal him, are up!)

Tock hears Stones go down and circles around the bugbear to gain a visual. He can barely glimpse him falling between all the wolves and fighting and whispers a hopeful, "Oh no, stay strong!" (casting Healing Word for 4).

He doesn't have more than a moment for that though as the bugbear is bearing down on him. He sees Dog go berserk on one of his assailants and decides to try to finish it off with a magical bolt:

Attack: 16 Damage: 18

Tock's bolt pierces the bugbear's neck. It gurgles briefly and then collapses.

(Stones is up!)

Stones gasps and says “well that’s another life down.” He then pulls out his Mac-Fuirmidh Cittern and and strums a light tune close to “Flight of the Bumblebee” and casts Fly and shoots straight up 20 feet where he will prepare to take his next available action.

The bugbears are no slouches. They each swing at Stones as he tries to escape.

Greataxe Attack: 18 Damage: 8

Greataxe Attack: 13 Damage: 14

Greataxe Attack: 22 Damage: 10

And Stones comes crashing back to earth!