Four Legends trophies that do not count towards the platinum, and the map work that does
For the Living is the game's longest map job and one of only two silvers outside the sensei tales. The four Legends trophies, by contrast, can be left alone without touching the platinum.
And it counts towards Gifts for a Ghost, Memento, Wolves of Ezo, For the Living, Tale of Revenge, Student No More, Vengeance Fulfilled, Ghosts Unyielding, required for the platinum.
Ezo's five: one costs a minute, another costs the whole map
Memento. Customise a scene in Photo Mode. Open Photo Mode with Right on the d-pad and press Down to add a customisation: the trophy pops right there, with no need to take the photo. A minute's work, and plenty leave it pending on the assumption that something must be photographed.
Gifts for a Ghost. Collect 8 offerings left for the onryo.
The main inn of each region has an altar where people leave offerings as you advance through the story. They appear on their own: you only have to remember to pick them up, or swing by at the end when they are all there.
Inheritance. Claim your parents' talismans at the summit of Mount Yōtei. You have to complete the climb to the Mount Yōtei Shrine.
Wolves of Ezo. Clear every wolf den. It pays to do two early, because they unlock the she-wolf abilities that Wolf Bait needs: saving them for the end forces you to farm that trophy afterwards, in an already empty game.
For the Living. Rid Ezo of every camp belonging to the Yōtei Six.
It is the game's longest map job and one of only two silver trophies outside the sensei tales. That rank is the signal: the game is weighing it as a full campaign task, not as a collectible.
It is done alongside the story — the camps sit in the regions you pass through anyway — and doing it that way saves dozens of trips at the end.
Do two wolf dens early: they unlock the she-wolf abilities Wolf Bait needs. Leaving them for the end forces you to farm that trophy with the game already finished.
Legends: four trophies the platinum does not ask for
The co-op mode's four trophies do not count towards the platinum. That is the fact that decides whether this block interests you at all, and it is worth being clear on before you start playing online:
Tale of Vengeance. Complete every mission in the Legends story.
No Longer an Apprentice. Reach rank 25 with a class.
Vengeance Complete. Complete the 4 raids.
Unyielding Ghosts. Complete a Survival mission on Gold difficulty or higher.
These four are what separate the platinum from 100%. None is hard on its own, but No Longer an Apprentice and Vengeance Complete ask for time and teammates: rank 25 is a long grind and the raids are built for a coordinated group.
The order that saves time is to do the Legends story first — it teaches the classes and raises rank along the way — leave Survival on Gold until you have decent gear, and keep the raids for last.
If you are only after the platinum, you can finish the game without touching Legends even once.
The four Legends trophies do not count towards the platinum: they are what separates the platinum from 100%.
The trophies involved
Each one links to its section inside the full Ghost of Yōtei trophy guide.