Mayhew will Eldritch Blast the redbrand that struck Templeton.  10 to hit and 9 damage.

As a bonus action, he'll use one die of Healing Light on Templeton, healing 2 hit points.

The Redbrand ruffian dodges Mayhew's Eldritch Blast.

Templeton, your turn.

Templeton will dip down around the barrels and back up into the room (BA Disengage) Grabbing and arrow he draws and shoots at the one that attacked him.

Attack: 22 Damage: 7

The ruffian takes an arrow to the left shoulder. Fortunately, he is right-handed.

Pip, you're up.

Bear pip charges into the fray. Taking two attacks at the nearest ruffian. 

claw attack: Attack: 11 Damage: 15

bite: Attack: 9 Damage: 12

The Redbrand ruffian on Templeton goes down. The next one steps up and takes a swipe at Templeton but misses.

Nari, your turn. 

Nari runs up, slashing with her blades.

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Action. To Hit: 11, Damage: 6
Bonus Action. To Hit: 22, Damage: 5

Nari manages to move over the cistern and put herself between the two ruffians still up as Templeton moves into the next room to gain range and shoots. She is now flanking with both Templeton and bear Pip. She hits one of the ruffians twice, nearly taking him out.

The third ruffian tries Templeton's trick and moves over and around the barrels to reach bear Pip. He hits for 4 hp damage to the bear.

Mayhew, Templeton, Pip, Ruffian A, Nari, Ruffian C.

Mayhew will give the "nearly taken out" ruffian the ol' Eldritch Blast, with 13 to hit and 12 damage.

The ruffian between Templeton and Nari falls.

Templeton, Pip, Nari, Ruffian C, Mayhew.

If there is space between Templton and closest ruffian then Templton will use steady aim as a Bonus action. If not he will use disengage as a bonus action and retreat abif before shooting:

Attacking closest ruffian to Templton.

Attack roll 1: 20

Attack roll 2 if steady aim used for advantage:  14

Damage:  9 plus sneak if applicable  5

Templeton shoots the remaining ruffian standing between Nari and Pip as he attempts to dodge past the bear and around the cistern.

Pip, Nari, Ruffian C, Mayhew, Templeton

Bear Pip attacks the ruffian before they can get through and warn any allies.

claw: Attack: 9 Damage: 15

bite: Attack: 9 Damage: Unable to parse dice roll.

Nari makes way toward the remaining ruffian, one of her shortswords going wide but the other sinking deeply into the guys chest.
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Action: To Hit: 8, Damage: 8
Bonus Action: To Hit: 25 (Nat 20), Damage: 10

Feels like that'd finish him off.  If so, Mayhew will ask who needs Healing Light.  If he's still up, it's the ol' EB for him when Mayhew's turn comes around.

(@ Dm lmk when I run out of time for my second wildshape of the day. Not sure what makes sense but I’ll plan to stay in it as long as possible.) 

Bear Pip takes out the last ruffian, and Nari ensures he is dead.

Pip, you have about 40 minutes left to stay in your wild shape.

Nari will look around and investigate the bodies for anything useful. 

Nari, you find 12 gp, 28 sp, 20 cp, and 11 ep as well as two garnets.

Mayhew will go over to the cistern and pull up the rope, to see if anything other than a bucket is attached to it.