There are minor things that change from tank to tank so there isn't a standard "These are the best enchants for a tank" it's really dependent on the tanking class as you will see if you compare these enchants to the Death Knight enchants. Some stats are just more important than others depending on the tank.
This guide will cover what the best enchants for your Warrior by slot. This guide assumes that you are defense capped at 540 defense, if you are not, then you may want to take any defense enchants that may have not made their way to the #1 slot.
