Chapter 1: The Island
The allosaurus looks like it wants to GTFO, but hasn't moved yet. What do you do?
Rolls
Pounce DC14 Strength Save for Claw - (1d20+6, 2d6+5)
1d20+6 : (16) + 6 = 22
2d6+5 : (54) + 5 = 14
Bite - (1d20+6, 1d10+5)
1d20+6 : (6) + 6 = 12
1d10+5 : (5) + 5 = 10
Sharpshooter - (1d20+5, 1d8+15)
1d20+5 : (15) + 5 = 20
1d8+15 : (8) + 15 = 23
Sharpshooter - (1d20+5, 1d8+15)
1d20+5 : (5) + 5 = 10
1d8+15 : (8) + 15 = 23
Using Second Wind as a bonus action, taking the Ready action to ready an Attack (2 stabs with my rapier) if the allosaurus pursues me. 1d20+6, 1d8+3,1d20+6, 1d8+3 if you want to roll it when/if the dino decides to give chase.
41/52 HP | 14 AC | Action Surge 1/1 | Second Wind 0/1
Rolls
Second Wind - (1d10+8)
(6) + 8 = 14
The saber-tooth pounces, burying its claws in the allosaurus' flanks (14 damage). The dinosaur stumbles from the ferocious attack, but manages to keep its footing as it turns to flee. But then Khiiral's arrow slams into its throat, and it's dead before it hits the ground. Combat over!
The ground begins to shake, followed by a tremendous roar as a column of dark ash erupts from the solitary peak in the center of the island.
Ian: The stone Valrakas gave you grows warm, and the captain's voice crackles in your ear:
Rolls
DC14 STR save vs. Prone - (1d20+4)
(14) + 4 = 18
He fishes into his pack and pulls out a length of rope and starts tying it to the tree and quickly makes a harness for the Saber-Toothed Tiger. Gently petting the tiger he tries to get the beast to help.
Rolls
Animal Handling - (1d20+2)
(14) + 2 = 16
Athletics for kitty if he will help - (1d20+4)
(14) + 4 = 18
Athletics for Khiiral - (1d20+3)
(12) + 3 = 15
Rolls
Athletics - (1d20+5)
(14) + 5 = 19
Rolls
Str check +3 (Ath if needed +6) - (1d20+3)
(13) + 3 = 16
Rolls
Athletics - (1d20+3)
(5) + 3 = 8
Spending Inspiration - (1d20+3)
(8) + 3 = 11
Rolls
Athletics - (1d20+7)
(11) + 7 = 18
Everyone now has Inspiration, but also suffer Level 1 Exhaustion from the exertion. Roll CON saves vs. DC 15 or also suffer the Poisoned condition due to smoke inhalation.
You've retrieved your boat. Now how do you get the log to the ship?
Rolls
con save - (1d20+3)
(16) + 3 = 19