Item Level > Haste > Crit/Vers > Mastery for all situations
Haste - Haste is a preferred secondary stat for Protection Warriors as it reduces the cooldown of your rage-generating abilities and global cooldown. This allows you to use them more frequently, which supports the Anger Management rotation.
Critical Strike - Critical Strike increases your parry chance as well as provides you with the chance to deal double damage on spells.
Vers - Vers is pretty straightforward, it increases the damage you deal and your healing by a flat percentage and decreases the damage you take by half that percentage. Most Protections healing sources are affected by vers, except Indomitable, making vers a decent survivability option.
Mastery: Critical Block - increases your block chance and gives you a chance to Critical Block, block twice the amount of damage. Additionally, it increases your attack power by a flat percentage. The defensive side of Protection’s mastery is a bit underwhelming. There are already a ton of sources from its talent trees, like Shield Specialization, that increase our base block chance that mastery becomes a bit redundant as a stat to have. By no means does this mean avoiding mastery. It still has its advantages, but you aren’t going to be actively looking for it.
Race doesn’t really matter for Protection Warrior; play whichever one you like more!
Chest: Enchant Chest - Waking Stats
Waist: Shadowed Belt Clasp
Legs: Fierce Armor Kit
Sims will tell you which gems are best. You want at least 1 of the Fierce Diamond gems for the primary stat, otherwise, haste gems will be best.
Health Potions: Dreamwalker's Healing Potion
Weapon Oil: Howling Rune
Runes: Draconic Augment Rune