Troubles in Paradise

The armoured sharkman managed to avoid the attack.

But Davis has to repeat DC 11 Wisdom saving throw.

Trudie would lightly sway her head as she'd hum a surprisingly familiar tune to herself as the battle would unfold before her.

Wis Save: 16

Davis wis save: 20

Today wasn't the old Tort's day to head for the light.

Finding themselves close to her, their senses are assaulted by old nan smell.

Reaction on SH: 4 Necrotic Damage
(Halo of Spores: You can use your reaction to deal 1d6 necrotic damage to one creature you can see when it moves into a space within 10 feet of you or starts its turn there, if it fails a CON saving throw (DC 16) )

With wide strides of her arms and legs, she casually swims up between the two beauts. Continueing her hum, Trudie does a flourishing spin with her staff before pushing out. "Grandma shark, doo doo doo doo doo doo." She'd redirect the current sending a rush of water forward over the targets in front of them.

On SH, S1 and S2?
Action: Tidal Wave Dex DC13 for half 19 or fall prone.
BA: Making sure her animated shield is activated to have her full AC

Hansel WIS save: 24

Oof! Well swimming right up to a giant shark probably isn't a wise thing to do either.

12 17

It did seem bad, true: Hansel froze in front of that fence of teeth, it seemed one bite and even that shiny armour would not save the young cleric's life. And yet - nothing happened. Though Hansel remained motionless, charmed by the light of the lure, the shark did not have a chance to bite. The giant body first jerked as the strange spots appeared on the skin, but then the water itself turned against its inhabitants, rolling the shark and the sahuagin behind it, and crushing them with all the might of wild nature.

The heavier sahuagin regained his bearings fast, but the lighter one was hit hard by the current, having a look of stunned fish. The massive body of the dead shark slowly sunk to the depths.

Yusko! (Don't forget DC11 Wis save)

Wisdom save 14

Yusko states tight at the bright light and swims closer.  He lashes out with several strikes.

Attack: 24 Damage: 10

Attack: 12 Damage: 9

Bonus action attack Attack: 12 Damage: 6

+ 4 sneak attack on first hit

All on S4 with the light if that wasn't clear

 Remarkably resistant to the common underwater lure people continued to fight for their lives and quite successfully. Even in the darkness of the deep, it was clear G4 was on his last legs and fins. But the cold anglefish-like evil expression did not change - he was going to die fighting! However, the first one to attack was G2 - bloodied and beaten but moving. He overcame his temporal light paralysis and swam to the closest enemies.

vs Trudie: Attack: 18 Damage: 15

vs Hansel Attack: 16 Damage: 15

Hansel is still charmed, Davis's turn! (He has one enemy next to him - S3 and can swim to the almost dead S4 15ft away from him)

Davis seems to expand in the water, turning from his normal, more than six feet tall, self, into a towering giant well over 12 feet in height. (Bonus action.)

Then with his larger form, and the reach of his glaive, he strikes at S4, then S3 if S4 goes down... (Giant-size should make him fill a ten-foot space, which should cut the distance to S4 down to 10 feet.)

Attack: 15 Damage: 12
Attack: 30 Damage: 17

Add 4 to the first strike that hits, and this will also push that target 5 feet away, in which evre direction seems most favorable to the group. (Crusher feat.) It will also slow them by 10 feet (slasher feat.)

Add 6 from Giant's might to which ever hit seems most appropriate, if both attacks hit. If only one does, then add it to that one.

If the one Davis hit with the critical hit is still up, then it has disadvantage on all attacks until the end of Davis's next turn. (Slasher feat.)

Suddenly expanding warrior made even emotionless "faces" of the sharkmen express some concern. Though G4 did not express it for long - he was dead after the first strike (the body was sent down to the deep) and enlarge warrior turned his attention to another attacker. S3 looked - and definitely was sturdier, but his shell incrusted armour could not protect him from the mighty strike.

S3 did try to retaliate right away, but his blade was visibly too slow to really harm the giant:

Attack: 17 Damage: 13
Attack: 16 Damage: 16
Attack: 20 Damage: 9

S1, though, did not back up either of his fighting companions and swam up, to the nameless girl (both are 35ft above the party):

Attack: 14 Damage: 6
Attack: 21 Damage: 12
Attack: 22 Damage: 11

Round 3

Nameless - Trudie - Yusko - S2 - Hansel - Davis - S3 - S1

As the enemy closes to within 5 feet, the Nameless girl whips out her rapier, the blade weaving through the water lazily...and then jabbing out with sudden viciousness. She moves her hunters mark onto this new enemy as she attacks. 

Attack: 12 Damage: 10 + 4

Attack: 14 Damage: 8 + 4

The new attacker proved to be harder to hit but the girl found a gap in the rock-hard armour to plunge in her rapier! The sea devil neither died nor run away and raised his waved blade for the next attack.

Trudie and Yusko! (S1 is 30ft above you right now, S2 - right in front of Trudie and Hansel)

Yuskk takes a moment to take stalk of the situation.  In stressful moments like this one needs to triage.  Davis was very large and facing a heavily injured foe.  Hansel and Trudie were tag teaming another Fishman and the not a bus girl was fleeing?  That seemed most pressing.  So, like a majestic salmon swimming up stream, so too did Yusko glide through the water.  Then like a fish to a bear, he slapped it the face a few times.

----

Using my wonderful math skills to figure out the diagonal line from where he's at to where the fish by nameless is, 45 foot swimming movement is plenty to get there.

Action attack fish slap, I'll let you debate is he is slapping like a fish or slapping a fish or both 

Attack: 9 Damage: 10

Attack: 19 Damage: 9

First hit gets 8 sneak damage

Bonus action Attack: 11 Damage: 5

Yusko swam as sahuagin themselves - not only nimbly but incredibly fast, ramming into the big armoured sea devil. The first attack definitely got through, but the shell-incrusted armour repelled the rest of them. Still, the monster found itself against two now.

Trudie!

The Sahuagin who find themselves close to the old turtle got a good waft of must.

Reaction on S2: 6 Necrotic Damage 
(Halo of Spores: You can use your reaction to deal 1d6 necrotic damage to one creature you can see when it moves into a space within 10 feet of you or starts its turn there, if it fails a CON saving throw (DC 16) )

Trudie would take her staff in both hands, bringing it down to bop S2 on the noggin.

On S2
Attack: 24 Damage: 8 

16

 Now the greenish (just dark in the depths of the ocean) spots covered scaly skin of S2 and the staff, that hit the sharkman's head, answered as if Trudie smacked a book.

Deeply offended sea devil unleashed all its fury on the old turtle, forgetting about his weapon and going all teeth and claws:

vs Trudie Attack: 19 Damage: 7

vs Trudie Attack: 20 Damage: 7
vs Trudie Attack: 23 Damage: 4

He was so into it, as if Hansel was not even there.

Hansel and Davis! (Davis is engage with one strong sahuagin in melee)

Davis grips his glaive and strikes at the one nearest him...

Attack: 25 Damage: 11
Attack: 17 Damage: 10
Bonus action polearm master Attack: 18 Damage: 9

The first hit that strikes will send the enemy 5 feet away from Davis, due to Crusher feat. it will also slow the enemy's speed by 10 feet, slasher feat.

The first hit will also do an extra 4 damage, from his warlock patron, and an extra 6 from his giant's might ability.

Davis will move, as long as one hit managed to get through, so he is 15 feet from the shark-man, giving Davis the ability to use his opportunity attack if it comes back into melee range of his glaive.

(I assume Hansel's turn is just an end-of-turn WIS save. Let me know if that's not right. 21)

Not anymore, Hansel is free now.