To kinda answer your question, the best gear in the game will most likely drop from the hardest raids. Or you will accumulate some sort of currency from doing raids that will allow you to purchase the top gear.
Crafting will most likely not get you the best gear. Also,there is a difference between pvp gear and pve gear. They will have different stats. So doing pve scenarios will get you pve gear and pvp rewards will get you pvp gear.