For all raiders looking to gear up before our first raid December 2, here is a list of the BIS gear you can get before the raid opens. Assuming they keep these links updated, you may be able to use this through the course of the expansion.
A couple of notes on where to find some of these:
Challenger's Strongbox - This is a reward for doing a level 100 challenge mode dungeon.
Invader's Forgotten Treasure - This is a reward for surviving a level 100 garrison invasion with a rating of Gold. Some speculation that you only get this chest if you get a gold rating and have a friend in your garrison helping with the invasion.
Anything that says "Create _____" such as"Create Chest" comes from an item that you can earn from certain follower missions.
**Please note that these are the individually best in slot pieces without looking at your overall gear. To coordinate with your overall gear, use something like Mr. Robot or SimulationCraft.**
Death Knight
Blood
Frost
Unholy
Druid
Balance
Feral
Guardian
Restoration
Hunter
Beast Mastery
Marksmanship
Survival
Mage
Arcane
Fire
Frost
Monk
Brewmaster
Mistweaver
Windwalker
Paladin
Holy
Protection
Retribution
Priest
Discipline
Holy
Shadow
Rogue
Assassination
Combat
Subtlety
Shaman
Elemental
Enhancement
Restoration
Warlock
Affliction
Demonology
Destruction
Warrior
Arms
Fury
Protection