Quick PSA for people, because I’m seeing many that are super excited to pop their vault tomorrow. There’s even people in Trade asking about the precise hour when it opens. Long story short, if you have more than one item pick in your vault, DON’T open it first thing when you log on. Go do the World Boss first. Go do your 4 mythic dungeons for the weekly. That way when you pop the vault, you know which of your item slots to target.
I know you’re excited, but trust me, nothing will deflate your excitement about the vault more if you pick a helmet out of it, then get a helmet from the World Boss and then a heroic helmet from the weekly event. The idea of the vault is to five you choice, be smart about how you make that choice.