Chapter 1

As it is such a basic action I will let you do it as a bonus action too.

The Dreadship I assume? You don't need to roll an attack as you can't miss it. Just damage will do :)

Got it. Could you give me a Charisma/Diplomacy Check Please?

Rolling

Some good news. Vicious Mockery is a cantrip so you still have all of your spell slots.

To recap:
Harbek fired his crossbow and hit the leading pirate causing them to pile up on the stairs leading up to the castle. Magak and Glórendil rushed to the foot of the stairs to aid the archers in the castle. Unbeknown to them, their aid wasn’t needed as a marine cast burning hands, incinerating the pirates but accidently catching Glórendil and Magak in the blast.
11 fire damage to Magak
6 fire damage to Glórendil

Que and Saris are trying to cut the ship free. They have cut four of the grappling hooks leaving five left.

Magak is taking his anger out on the Dreadship's hull.

Glórendil is attacking the pirate crossbowmen with his vicious words.

Placing his crossbow down and starting to follow Magak and Glorendil towards the pirates invading their ship, Harbek stops short when he sees the gouts of flame erupt from the sailors hands and take out all of the advancing pirates. As he starts to smile, he notices that the flames also engulfed his new friend Magak and another of the travelers helping the pirates. Stopping in his tracks, he begins to pray to Pelor for healing on his companions,

"Pelor, lord of light, grant me your blessing so that I may provide healing to those who are fighting for the side of light against the evil that has set upon this ship."

@Harbek
You call out to Pelor and for a moment nothing happens, you doubt your faith for a fraction of a second and then your holy symbol glows with that same blinding white light which flows from your hand and into Magak. As if Pelor would abandon his faithful in his time of need you chide yourself as you make a mental note to do some penance when you get the chance.@ Glórendil
As the battle rages around you time stands still for a moment as you focus on the pirate crossbowmen above you. You unleash a torrent of insults but, alas, they fail to pierce the veil created by the sounds of raging battle. However, as you attack the crossbowmen, some of them duck down and out of view.@Que, Saris and Magak
Que and Saris rush along the port side of the ship cutting grappling lines as they go. While running, Saris makes eye contact with a hard-looking dwarf warrior. As they lock eyes, the dwarf seems to instinctually know your request and rushes to cut two more of the grappling lines. Then the pirate crossbowmen unleash a volley towards Saris, Que and Magak. Magak leaps onto the ships railing and begins hacking away at the Dreadship. He knocks a massive chunk of wood as his greataxe seems to be having some effect. You hear some cries from above and many pirates are pointing towards you. The cry goes up and the crossbowmen are hurriedly reloading and getting ready to fire in your direction.You see some pirates clutching ropes and preparing to swing over.

What do you do?

Sorry yeah. Dex save please.

I attempt to dodge the bolts while taking another swing with my axe.