You’re looking for Purveyor Zo’kuul or Zo’sorg, both located inside The Enclave in Oribos 🙂

For mark of honor you can buy gear for transmogs from seasons (and previous additions, you also need to look for vendors from addons) and pvp gear reviews for the profession.

Play a lot of PVP modes - random Battlegrounds or arenas. Besides what Wednesday you can pick up one item from valua in Oribos

@ozeroz I read a lot of guides and watched great fights related to Castle Nathria. In my opinion and from what I have seen, there are two variants:

Vengeance Demon Hunter and Protection Warrior Vengeance Demon Hunter and Brewmaster Monk

Demon Hunter - imposed on the boss Chaos Brand debuff which increases magic damage received by 5% it is also very mobile and highly durable

Protection Warrior is very good at dealing with physical injuries. Has the ability to buff a group that increases attack power

Brewmaster Monk put on target Mystic Touch increasing Physical damage taken by 5%. Stagger is also very useful and works very well in phases where the tank takes the most damage from the boss.