Armor Armor reduces physical damage received.

Haste increases attack and spell casting speed, adds additional damage and healing to DoTs and HoTs, and reduces the GCD.

Agility increases your attack power and the damage dealt by your abilities. Further, Agility slightly increases your chance to Dodge.

Mastery provides a passive bonus to your character based on your specialization. Mastery Fel Blood increases the armor provided by Demon Spikes and increases your attack power.

Stamina increases your total health.

Versatility increases your damage, healing, and absorption done and decreases damage received.

Critical Strike increase the chance for your spells and attacks to critically hit for additional damage and healing. As Vengeance, Crit also increases your chance to Parry via Riposte.