The Taino Assassin
Talk to Opia Apito on Cayman Sound to start this mission. Your objective is to skin more animals than her, but there is a limited supply and you will be racing against her. Make sure you have a gun with decent range and some bullets before you start this.
The first kill will be hers, you can not beat her to the target and shoot it before her, so head northwest to the second target and locate it with Eagle Vision and then shoot it and skin it quickly. Sprint back south now and hope to get to the next Hutia before her and locate and skin it. You will need to wait for more search locations, but you will likely have no problem beating her at this point. When the White Jaguar appears, kill it before it attacks or react to the QTE to defeat it and complete the memory.
Templar Ships
Meet up with Opia in Grand Cayman and then follow her for a quick conversation. Afterward, head to the easedrop zone and use Eagle Vision to spot your targets. Following the three is as easy as moving from one blending spot to another until the three break up and you can then Fast Walk up to the target and pickpocket the ledger.
Right-Hand Man
Opia is only a short distance from the end of the last memory in Grand Cayman, so follow her to Vargas' house and hide in the bushes nearby for a scene. You will need to chase Vargas down, but you will not catch him. Once you trigger the cutscene where Vargas boards a ship run along the planks toward the Jackdaw and board it, catching Vargas' ship and boarding it to kill him.
The Trail of Lucia Marquez
Sail or fast travel to Pinos Isle to the north and talk to Opia on the beach to start this memory. Follow the target easily from stalking zone to stalking zone until you reach a set of guards you will need to kill. Use the powder keg nearest the guards for some kills and then finish off the rest. When more guards attack, use Smoke Bombs to immobilize them and make your job easy. After all the enemies are dead Marquez will pop out and run away. Chase her down and when she turns to shoot running assassinate her to complete the memory and the first Templar Hunt.
