Nioh

This is the hardest trophy in the DLC. You must have first unlocked Way of the Demon, which is done by completing most missions on Way of the Strong to unlock 'The Queen's Eyes' which upon completion will unlock Way of the Demon. You must then complete all missions in Siege of Osaka (Winter) on this difficulty.

If you have completed the main game and/or Dragon of the North on Way of the Demon then this shouldn't prove too difficult for you. You will have to complete the Tonfa Mystic Art Dojo Mission, which is a bit tricky and the Twilight Mission. I also strongly recommend finding all Kodama on Way of the Samurai so you can use the Healer Blessing on Way of the Demon to make elixirs drop more often.

You can also play on Way of the Wise for very high level gear, frequently dropping at a minimum of level 200+ at +18 early on. This is not really necessary however but the option is there if you wish to upgrade your equipment even further.

I have linked a post from my Dragon of the North Guide here: LINK which provides in-depth tips for completing Way of the Demon missions and the same principles apply here. I highly recommend checking this out if you are yet to tackle the Way of the Demon.

The Tonfa Dojo mission is probably the hardest part of this, however if you use the High Stance with the Tonfa and attack just before Hanzo does, you should combo in to him and not take any damage, it may take a few tries to get the timing down but this is a relatively easy way of defeating him.