Ilvl > All due to Guardian druids having significant gains from Agility, Armor, and Stamina increases.
When comparing items of similar ilvl, you can use the following stat priority for defense:
Haste > Vers >= Mastery > Crit
OR if you are looking to maximize damage you can use:
Crit >= Haste >= Vers > Mastery
As always though, if you are looking for the exact offensive value of these stats you should sim yourself.
Agility affects all attack power scaling abilities, notably ironfur’s armor bonus scales off your agility.
Haste reduces your GCD and the CD of Mangle, Thrash, and Frenzied Regen.
Crit provides dodge.
Mastery increases your maximum health, healing received, and attack power.
Versatility increases the gains from a lot of your self-healing such as After the Wildfire, Ursoc’s Fury, and Elune’s Favored, on top of granting additional damage and damage reduction.
No race has a massive advantage over the others; that being said, the strongest would likely be Highmountain Tauren (Horde) with their uncapped AoE CC, or Night Elf (Alliance) thanks to Shadowmeld.
Notably, the Kul Tiran racial healing on its own isn’t much, but it does combine with our new 2p which together can be a nice trickle of self-sustain though not largely impactful.
Chest: Waking Stats
Bracers: Devotion of Avoidance
Cloak: Graceful Avoidance
Bracers: Devotion of Leech
Cloak: Regenerative Leech / Writ of Leech
Boots: Watcher’s Loam / Plainsrunner’s Breeze
Rings: Devotion of Haste
Weapon: Shadowflame Wreathe (damage, can also proc Eranog ring)
Legs: Fierce Armor Kit (LW)
Neck: Tiered Medallion Setting (JC)
Primalist Gem: Fierce Illimited Diamond (Agi/Haste)
Other Gems: Energized Ysemerald (Haste/Vers)
Food: Aromatic Seafood Platter (Haste/Vers), Grand Banquet of the Kalu’ak (Agi)
Phials: Differ depending on the situation and content you are doing.
Glacial Fury - Pure damage in M+ or boss fights that spawn new adds often
Eye in the Storm - Defense and damage in AoE situations where you are able to maintain high stacks from consistently tanking multiple mobs
Elemental Chaos - Damage in all other cases
Tepid Versatility - Defense in all other cases
Damage Pot: Elemental Potion of Ultimate Power in single target, Potion of Shocking Disclosure in multi target
Health Pot: Refreshing Healing Potion
Weapon: Howling Rune