WoW The War Within Beta: Season 1 Tier Set Bonuses

• Death Knight
• Demon Hunter
• Druid
• Evoker
• Hunter
• Mage
• Monk
• Paladin
• Priest
• Rogue
• Shaman
• Warlock
• Warrior

Death Knights will be rocking this sweet tier set: Exhumed Centurion's Relics 

Blood Death Knight Tier Set

• 2pc Bonus: While you have one or more Boneshield charges, the damage you take is reduced by 2%. Losing a Boneshield charge has a chance to reduce the damage you take by an additional 1%, up to 3% for 6 sec.
• 4pc Bonus: Your damage is increased by 1% per active Boneshield charge. Taking damage while below 6 Boneshield charges has a chance to generate 1-2 Boneshield charges.

Frost Death Knight Tier Set

• 2pc Bonus: Your Runic Power spending abilities deal 8% increased damage.
• 4pc Bonus: Consuming Runic Power has a chance to increase your Strength by 10% for 8 sec.

Unholy Death Knight Tier Set

• 2pc Bonus: Your minions deal 8% increased damage.
• 4pc Bonus: When you summon a minion, your Haste is increased by 2%, up to 8% for 8 sec.

Demon Hunters will be rocking this sweet tier set: Husk of the Hypogeal Nemesis

Havoc Demon Hunter Tier Set

• 2pc Bonus: Blade Dance deals 20% increased damage.
• 4pc Bonus: Chaos Strike deals 20% increased damage, and has a 25% chance to reset the cooldown of Blade Dance.

Vengeance Demon Hunter Tier Set

• 2pc Bonus: Soul Cleave deals 15% increased damage and has a 35% chance to shatter 1 Lesser Soul fragments from a target it hits.
• 4pc Bonus: Consuming a Soul Fragment increases the damage and healing of your next Fel Devastation by 2%, up to 30%.

Druids will be rocking this sweet tier set: Mane of the Greatlynx 

Balance Druid Tier Set

• 2pc Bonus: Starsurge damage increased by 8%. Starfall damage increased by 10%.
• 4pc Bonus: Lunar Eclipse and Solar Eclipse each increase the Astral Power Wrath generates by 1 and Starfire generates by 2.

Feral Druid Tier Set

• 2pc Bonus: Tiger's Fury increases your chance to Critically Strike for 10 sec, starting at 6% and increasing by 1% every 2 sec.
• 4pc Bonus: Critical Strikes with your combo point-generating abilities increase the direct damage of your next Ferocious Bite and Rampant Ferocity or Primal Wrath by 15%, stacking up to 3 times.

Guardian Druid Tier Set

• 2pc Bonus: Thrash and Moonfire increase your damage done and reduce damage you take by 1% for 8 sec, stacking 3 times.
• 4pc Bonus: Arcane damage you deal is increased by 5% and bleed damage you deal is increased by 5%.

Restoration Druid Tier Set

• 2pc Bonus: Regrowth, Wild Growth, and Swiftmend healing increased by 10%.
• 4pc Bonus: Your healing is increased by 8% when consuming Soul of the Forest's bonus and for 6 sec afterward.

Evokers will be rocking this sweet tier set: Destroyer's Scarred Wards 

Augmentation Evoker Tier Set

• 2pc Bonus: Upheaval deals 30% increased damage and increases the damage of your next 2 Eruption casts by 30%.
• 4pc Bonus: Ebon Might increases primary stats by an additional 0.4% of your own every 2 sec it remains active, up to 2.0%.

Devastation Evoker Tier Set

• 2pc Bonus: Disintegrate damage increased by 10% and Pyre damage increased by 10%.
• 4pc Bonus: Eternity Surge's cooldown is decreased by 5.0 sec and it now grants Essence Burst.

Preservation Evoker Tier Set

• 2pc Bonus: Reversion and Emerald Blossom heal an injured ally within 30 yds for 10% of any amount healed.
• 4pc Bonus: Verdant Embrace increases the healing of your next Reversion by 200%.

Hunters will be rocking this sweet tier set: Lightless Scavenger's Necessities 

Beast Mastery Hunter Tier Set

• 2pc Bonus: Barbed Shot further increases your pet's attack speed by 5%. 
• 4pc Bonus: Your pet's attacks have a 10% chance to increase all pet damage you deal by 10% for 10 sec. 

Marksmanship Hunter Tier Set

• 2pc Bonus: Arcane Shot and Multishot damage increased by 20%. 
• 4pc Bonus: Consuming Precise Shots increases the damage of your next Aimed Shot by 10%, stacking up to 2 times. 

Survival Hunter Tier Set

• 2pc Bonus: Wildfire Bomb damage increased by 5%. 
• 4pc Bonus: [Mongoose Bite / Raptor Strike] deals 10% increased damage to targets affected by Wildfire Bomb. 

Mages will be rocking this sweet tier set: Sparks of Violet Rebirth 

Arcane Mage Tier Set

• 2pc Bonus: Arcane Blast and Arcane Explosion damage increased by 6%. 
• 4pc Bonus: Casting Arcane Blast or Arcane Explosion has a 10% chance to make your next Arcane Barrage deal 10% increased damage and generate 4 Arcane Charges. 

Fire Mage Tier Set

• 2pc Bonus: Phoenix Flames damage increased by 10%. This amount is increased to 25% on its primary target. 
• 4pc Bonus: After dealing damage, Phoenix Flames has a 10% chance to return to you, refunding 1% of the cooldown on Phoenix Flames and granting you 6% increased spell damage for 10 sec. 

Frost Mage Tier Set

• 2pc Bonus: Ice Lance damage increased by 5% and Fingers of Frost increases the damage of your next Frozen Orb by 10%, stacking up to 10 times. 
• 4pc Bonus: Frozen Orb increases Ice Lance's damage by 15% for 15 sec. 

Monks will be rocking this sweet tier set: Gatecrasher's Fortitude 

Brewmaster Monk Tier Set

• 2pc Bonus: Blackout Kick and Keg Smash deal 20% additional damage, and Shuffle also grants 3% damage reduction. 
• 4pc Bonus: Blackout Kick increases your damage dealt by 1% for 15 sec, stacking up to 3, and has a chance to reset the cooldown of Keg Smash and make its next cast cost no energy. 

Mistweaver Monk Set

• 2pc Bonus: Enveloping Mist and Renewing Mist healing increased by 10%. 
• 4pc Bonus: Vivify extends the duration of Renewing Mist and Enveloping Mist on its primary target by 2.0 sec, up to 4.0 sec. 

Windwalker Monk Set

• 2pc Bonus: Your other melee abilities increase the damage of your next Tiger Palm by 25%, stacking up to 6 times. 15% of Tiger Palm's damage is dealt onto nearby enemies, reduced beyond 5 targets. 
• 4pc Bonus: Your other melee abilities increase the damage of your next Tiger Palm by 25%, stacking up to 6 times. 15% of Tiger Palm's damage is dealt onto nearby enemies, reduced beyond 5 targets. 

It seems that there is a discrepancy as we are uncertain what the actual 2 and 4pc bonuses are currently.

Paladins will be rocking this sweet tier set: Entombed Seraph's Radiance 

Holy Paladin Tier Set

• 2pc Bonus: Holy Shock's healing is increased by 10% and its cooldown is reduced by 10%.  
• 4pc Bonus: Holy Shock increases the initial healing of your next Word of Glory or Light of Dawn by 8%, stacking up to 4 times. 

Protection Paladin Tier Set

• 2pc Bonus: Shield of the Righteous deals 10% increased damage and grants 3% damage reduction. 
• 4pc Bonus: Casting a Holy Power ability increases the damage and healing you deal during your next Avenging Wrath by 0.5%. This effect stacks. 

Retribution Paladin Tier Set

• 2pc Bonus: Blade of Justice damage increased by 15% and Wake of Ashes damage increased by 10%.  
• 4pc Bonus: Wake of Ashes increases your damage done by 10% for 8 sec. 

Priests will be rocking this sweet tier set: Shards of Living Luster  

Discipline Priest Tier Set

• 2pc Bonus: Atonement healing increased by 5.0%. 
• 4pc Bonus: Smite and Penance increase the damage of your next Mind Blast by 25% or absorb amount of your next Power Word: Shield by 15%, up to 3 times. 

Holy Priest Tier Set

• 2pc Bonus: Serendipity is 10% more effective. 
• 4pc Bonus: Heal, Flash Heal, and Prayer of Healing have a 50% chance to cast again at 35% effectiveness. 

Shadow Priest Tier Set

• 2pc Bonus: The duration of Devouring Plague is increased by 1.0 sec. 
• 4pc Bonus: Devouring Plague increases your damage done by 2% for 10 sec, multiple applications may overlap. 

Rogues will be rocking this sweet tier set: K'areshi Phantom's Bindings   

Assassination Rogue Tier Set

• 2pc Bonus: When your bleeds deal damage, they have a chance to grant you Vile Tincture for 8 sec, increasing your poison damage by 1% per stack (up to 10 stacks). 
• 4pc Bonus: While you have 5 or more stacks of Vile Tincture, Garrote, Rupture, and Crimson Tempest deal 10% additional damage. 

Outlaw Rogue Tier Set

• 2pc Bonus: Your Sinister Strike, Pistol Shot, and Ambush have a 20% chance to Ethereal Rampage, dealing 15% increased damage as Shadow. 
• 4pc Bonus: Ethereal Rampage additionally increases the damage of your next Between the Eyes by 6%, stacking up to 3 times. 

Subtlety Rogue Tier Set

• 2pc Bonus: Symbols of Death increases the damage of your next Secret Technique by 20%. 
• 4pc Bonus: Secret Technique increases the damage of your other finishing moves by 16% for 7 sec. 

Shamans will be rocking this sweet tier set: Waves of the Forgotten Reservoir

Elemental Shaman Tier Set

• 2pc Bonus: [Elemental Blast / Earth Shock] damage increased by 25%. Earthquake damage increased by 25%. 
• 4pc Bonus: Spending Maelstrom grants you 5% increased critical strike chance and 10% increased critical damage dealt. 

Enhancement Shaman Tier Set

• 2pc Bonus: Stormstrike, Lava Lash, Ice Strike, and Crash Lightning deal 15% increased damage. 
• 4pc Bonus: Feral Spirits last 100% longer. 

 Restoration Shaman Tier Set

• 2pc Bonus: Tidal Waves increases the healing of affected spells by 10%. 
• 4pc Bonus: Tidal Waves is 80% more effective and reduces the mana cost of affected spells by 8%. 

Warlocks will be rocking this sweet tier set: Rites of the Hexflame Coven 

Affliction Warlock Tier Set

• 2pc Bonus: Malefic Rapture damage increased by 5% and its critical strike chance is increased by 10%.  
• 4pc Bonus: Malefic Rapture has a chance to increase damage dealt by your Agony, Corruption, and Unstable Affliction by 15% for 8 sec. 

Demonology Warlock Tier Set

• 2pc Bonus: Your primary demon deals 5% increased damage, and your Shadow Bolt damage is increased by 50%. 
• 4pc Bonus: Shadow Bolt has a chance to enrage your primary Felguard, increasing the damage of their next Legion Strike by 300%. 

Destruction Warlock Tier Set

• 2pc Bonus: Incinerate critical strike chance increased by 20%. Conflagrate critical strike chance increased by 25%. 
• 4pc Bonus: When Conflagrate critically strikes, your Fire damage is increased by 5% for 6 sec. 

Warriors will be rocking this sweet tier set: Warsculptor's Masterwork 

Arms Warrior Tier Set

• 2pc Bonus: Mortal Strike and Cleave increase the damage of your next Overpower by 10%. 
• 4pc Bonus: When Overpower has its cooldown reset by Tactician, your next Mortal Strike or Cleave has its damage increased by 10% and critical strike chance increased by 10%, stacking up to 2 times. 

Fury Warrior Tier Set

• 2pc Bonus: Bloodthirst increases the damage of your next Rampage by 10%. 
• 4pc Bonus: When Raging Blow resets its own cooldown, the damage of your next Bloodthirst is increased by 10%, stacking up to 2 times.  

Protection Warrior Tier Set

• 2pc Bonus: When your Shield Slam cooldown is reset by Strategist, you gain Expert Strategist, increasing the damage of Shield Slam by 5% and reducing all damage taken by 3% for 6 sec. 
• 4pc Bonus: Shield Slam critical strikes increase the damage dealt by Thunder Clap and Revenge by 10% for 8 sec.