Tier 1 (Restoration/Elemental Shaman - The Earthfury) extra bonuses:
5 pieces: After casting your Lightning Bolt or Chain Lightning spell, gives you a 25% chance to gain Mana equal to 35% of the base cost of the spell.
8 pieces: Increases the amount of damage done by Chain Lightning by 10%.
Tier 2 (Restoration/Elemental Shaman - The Ten Storms) extra bonuses:
3 pieces: Increases the amount of damage done by Chain Lightning by 5%.
8 pieces: You have a 20% chance to hit your target with a Lightning Shield orb charge when you deal damage with lightbing bolt.
Tier 2.5 (Stormcaller's Garb) extra bonuses changes:
3 pieces: Your Healing Wave, Chain Heal and Riptide spells have a 20% chance to grande 50 nature spell power for 8 sec. (Restoration shaman bonus change)
5 pieces: -0.4 seconds on the casting time of your Chain Lightning spell. (Elemental shaman bonus change)
Tier 3 (Restoration/Elemental Shaman The Earthshatterer) extra bonuses:
6 pieces: All non-periodic spell criticals have a 10% chance to grace you with a blessing of nature, increasing your spell casting speed by 20% for 3 sec.
PVP Sets (Hunter) bonuses:
3 pieces: Reduces the cooldown of your Earthbind Totem by 1 sec.
Tier 1 (Hunter - Giantstalker Armor) bonuses:
3 pieces: Reduces the cost of your Cure Toxins spell by 40%.
5 pieces: Lightning Shield increases your spell resistances against all schools of magic by 15.
8 pieces: Increases the amount of damage done by Chain Lightning by 10%.
Tier 2 (Hunter - Dragonstalker Armor) bonuses:
3 pieces: Increases your attack power by 20.
5 pieces: Lightning Shield increases your spell resistances against all schools of magic by 20.
8 pieces: Grants 3 additional charges to Flurry.
Tier 2.5 (Hunter - Striker's Garb) bonuses:
3 pieces: Reduces the cost of your Lava Lash by 10%.
5 pieces: Reduces the cooldown of your Feral Spirit ability by 1 minute.
Tier 3 (Hunter - Cryptstalker Armor) bonuses:
2 pieces: Increases the duration of your Shamanistic Rage by 2 sec.
4 pieces: While your Windfury Totem is active, your attack power increases by 50.
6 pieces: Your melee critical hits cause an Adrenaline Rush, granting you 15 mana.
8 pieces: Reduces the mana cost of your Stormstrike and Lava Lash by 20.
Priest
PVP Sets (Warlock) bonuses:
3 pieces: Reduces the cooldown of your Psychic Scream by 2 sec.
Tier 1 (Warlock - Felheart Raiment) bonuses:
3 pieces: Increases the duration of your Fade ability by 2 seconds.
5 pieces: Your Inner Fire also increases your spell resistance against all schools of magic by 15.
Tier 2 (Warlock - Nemesis Raiment) bonuses:
5 pieces: Your Inner Fire also increases your spell resistance against all schools of magic by 20.
Tier 2.5 (Warlock - Doomcaller's Attire) bonuses:
3 pieces: 5% increased damage on your Shadow Word: Pain spell.
5 pieces: Reduces the mana cost of your Mind Blast by 15%.
Tier 3 (Warlock - Plagueheart Raiment) bonuses:
2 pieces: Your Mind Blast now have a chance to heal you for 270 to 330.
4 pieces: Increases damage caused by your Shadow Word: Pain by 12%.
6 pieces: Your spell critical hits generate 25% less threat. In addition, Shadow Word: Pain, Mind Flay, Devouring Plague and Vampiric Touch generate 25% less threat.
8 pieces: Reduces mana costs of all Shadow spells by 5%.