Warlock
Demonology
Demonology Warlocks now gain access to a new powerful debuff if talented called 
Demonic Brand alongside 
Decimation. The exciting new capstone 
Demonic Pact makes it so you can have an active Demon out while having another sacrificed through 
Demonic Sacrifice. Demonology has always been a great leveling spec, as you can just lay back, and let your pet tank while being basically unkillable yourself with 
Soul Link and multiple 
Sacrifice with 
Fel Domination.
Damage Curses became Banes, and each warlock can now use 
Bane of Agony or 
Bane of Doom, while also using one utility curse like 
Curse of the Elements.
DoTs can also crit, which was one of the biggest changes, and added an additional way of scaling DPS. 
Summon Voidwalker has been improved, and is now a formidable Tank for your early levels. Then at level 20 you'll also gain access to 
Summon Succubus. Offering powerful DPS, and once you spec into Demonic Brand it can comfortably tank for you as well.
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Strengths And Weaknesses
- Efficient Solo Leveling with strong self-sustain
- Sustained Damage & High Uptime
- Top tier raid/group utility providing Healthstones, Soulstones, Curses and cc with
Fear and 
Banish.
- Damage over time loses value against enemies that die quickly
- Casting and channeling restrict movement
- Vulnerable to interrupts while casting key damage spells.
Guide Variants
This is our recommended leveling spec to go for once you respec at level 27. If you don't wish to respec you can just follow this Talent Build, but we would advise using the 'Respec at 27' tab if you want to be more efficient in the earlier levels.
Talents
Level 10-14: 
Improved Corruption 5/5 Level 15-19: 
Unholy Power 5/5 Level 20-21: 
Demonic Energies 2/2 Level 22-24: 
Demonic Embrace 3/5 Level 25-27: 
Improved Sayaad 3/3 Level 28-29: 
Master Summoner 2/2 Level 30-32: Demonic Brand 3/3 Level 33-33: Fel Domination 1/1 Level 34-34: Demonic Sacrifice 1/1 Level 35-35: Soul Link 1/1 Level 36-37: Decimation 2/2 Level 38-40: 
Demonic Knowledge 3/3 Level 41-45: 
Master Demonologist 5/5 Level 46-46: Demonic Pact 1/1 Level 47-50: 
Suppression 4/5 Level 51-52: 
Soul Harvest 2/2 Level 53-54: 
Destructive Reach 2/2 Level 55-59: 
Bane 5/5
Level 60-60: Suppression to complete 5/5
We take Decimation in this build to benefit from the 6% extra damage from 
Searing Pain or 
Shadow Bolt when the target is below 35% health, you won't be able to cast 
Soul Fire at the level we pick the talent which is 37 since the ability is only trainable at 48.
Gameplay & Rotation
Leveling Rotation: 1. Curse of the Elements 2. 
Corruption 3. Bane of Agony skip this step if the mob dies too fast when you have Demonic Brand 4. 
Immolate 5. Searing Pain once we unlock Demonic Brand only to buff the pet don't spam it. 5. Wand up to level 25-30 6. When you're low on mana use 
Life Tap
Pet choices: We use Summon Voidwalker up to level 27 then we utilize Summon Succubus.
When your pet is about to die, just summon a new one. 
Health Funnel Is really bad early.
Gear
Getting an early Wand is the most important part of starting a new warlock.
These are all viable options on how to acquire one:
1. Buy 
Lesser Magic Wand on AH for around 5silver
or
1. Buy 
Lesser Magic Essence from the enchanting vendor for 8 silver. Limited supply
or
1. Get skinning, gather some leather and craft 
Handstitched Leather Vest with leatherworking, so you can disenchant them. You can also make 
Brown Linen Pants with tailoring. You will need to make around 7, since non weapons have lower chance to disenchant into Lesser Magic Essence -which we need to make the wand.
2. Level enchanting to 10 with 
Enchant Bracer - Inferior Stamina and also make one Runed copper rod. Mote of Magic, Copper rod and Simple wood are from the enchanting vendor.
3. Craft Lesser Magic Wand yourself with 1 simple wood from the vendor and one Lesser Magic Essence
If you don't prefer going enchanting there are still other wands out there that you can obtain:
Riptear's Spare Arm - Rear Guard Patrol Quest Horde only from Tirisfal Glades
Deepblaze - Old Ironforge Incursion Halls of Thanes chain from Earthseer Farsen Alliance OnlyCinder Wand - Arugal's Folly Chain from Dalar Dawnweaver in Silverpine Forest Horde onlySpark of the People's Militia - The People's Militia Chain from Gryan in Westfall Alliance only 
Branding Rod - Isha Awak chain from the barrens starts from Mahren in ratchet Horde only Flaring Baton - The Escape chain from the barrens starts from Wizzlecrank's Shredder Horde only Cookie's Stirring Rod - Drops from Cookie in The Deadmines 
Spellcrafter Wand - Retrieval for Mauren quest starts from Collin Mauren in Stonetalon Alliance only
Gravestone Scepter - Blackfathom Villainy quest starts inside Blackfathom Deeps for both factions These are not ranked in any order, there are many wands out there as well from quests & especially boe drops so keep an eye out for them!
Weapon upgrades:
Fang of Magmatus - from Hall of Thanes 13-18 Alliance Instance. (18 Spell damage)
Staff of Orgrimmar - From the Hidden enemies chain Horde only. (18 Spell damage)
Gnarled Necromancer's Staff - From Ruins of Lordaeron Instance quest. (26 Spell damage)
The Orb of Soran'ruk - A Warlock only quest, head over to Doan Karhan in the Barrens (49, 57). Both Factions can pick this quest up.
1) Collect 3x Soran'ruk Fragment - Dropped by Twilight's Hammer Acolytes in the Blackfathom Deeps dungeon
2) Collect 1x Large Soran'ruk Fragment - Dropped by Shadowfang Darksouls in Shadowfang keep.
The Orb of Soran'ruk quest rewards you with a choice of 
Staff of Soran'ruk or 
Orb of Soran'ruk
Stat Priority
Leveling: Spell damage > Hit > Crit
End-game: Hit (until cap) > Spell damage > Crit
Consumables
Flasks / Elixirs: 
Flask of Supreme Power
Elixir of Shadow Power
Greater Arcane Elixir
Elixir of the Owl 
Elixir of Sages 
Elixir of Fire Power
Elixir of Greater Fortitude 
Cerebral Cortex Compound From Blasted Lands or 
Spirit of Zanza from ZG island (Cant stack)
Food: 
Spotted Yellowtail
Weapon Oil:
Wizard Oil then we use 
Brilliant Wizard Oil once it's available.
Weapon Imbue: 
Create Spellstone Major Spellstone - 2% Spell haste + 21 shadow damage
Create Firestone Major Firestone - 2% Spell crit + 21 fire damage
We now have access to combat potion with 
Major Spellblasting Potion, which we use during combat with previously known 
Dark Rune or 
Demonic Rune
Disclaimer: Not all consumables got discovered yet, this section of the guide will be updated as we find new ones.
Professions
We are expecting 
Tailoring to have some nice prebis/bis early gear that will be BOP. So we would recommend tailoring.
Second professions is based on your preference and playstyle. If you want to speedrun and minmax, then 
Engineering will be mandatory due to 
Goblin Sapper Charge, 
Thorium Grenade and all other cool gadgets that engineering offers.
You can have 
First Aid along with the other professions since it is a secondary profession. It will be very useful to bandage while leveling for less downtime and also for end-game content.
Suggested Races
Looking at purely 
DPS, currently all races are almost equal (less than 0.5% difference) so feel free to choose whichever you like the most or choose based on PvP racial.
For ultra minmax this is the list: 
Orc = 
Human = 
Undead > 
Gnome > 
Troll
Alliance
Human
Human is the best race for alliance warlocks. It provides:
Will to Survive Instantly removes stun effects
Perception Increased stealth detection for 20s
Ruthless A Passive that increases your critical strike chance with all spells and attacks by 1%
The Human Spirit A passive spirit increase by 10%
Gnome
Gnome is also still a good option for alliance warlocks it provides:
Escape Artist Instantly removes movement impairing effects and immune to them for 3s
Eureka! Non-periodic damaging abilities cost 10% less mana and do 10% more damage for 8s
Expansive Mind A passive maximum mana increased by 5% 
Engineering Specialization Reduction on engineering devices backfiring or failing by 20%
Horde
Orc
Orc is the best race for horde warlocks it provides:
Blood Fury Increases Spell power by 10% for 15s
Command A passive increasing pet damage by 5%
Shatter Curse Removes Banes / Curses and reduces magic damage taken by 5% for 8s 
Hardiness Stun durations decreases by 20%
Undead
Undead is another playable race for horde warlocks it provides:
Will of the Forsaken Instantly removing charm, fear, and sleep effects
Cannibalize Regenerates 35% health and mana over time used on a corpse
Underwater Breathing A passive 300% longer underwater breathing duration
Touch of the Grave A passive that does damage from your attacks.
Troll
Troll is the new playable race for horde warlocks it provides:
Berserking Increasing casting speed by 15% for 10s
Rapid Regeneration A channel that Regenerates 50% of maximum health over time
Beast Slaying Damage to beasts increased by 5%
Regeneration A passive that makes 20% of health regeneration continues in combat
Brief disclaimer about some races. Eureka! does not benefit our dot effects, Touch of the Grave works ONLY on abilities that are not dots e.g Shadow Bolt initial dot application can proc it, Berserking only effects spellcasting spells and not channeled spells.
Voidwalker Quest - Level 10
Human
1) Gakin's Summons - Available from your trainer in Goldshire.
2) Head to Gakin the Darkbinder in the Mage Quarter Slaughtered Lamb, Stormwind.
3) Surena Caledon - You can find her at the farm southwest of Eastvale Logging Camp in Elwynn, you'll need to loot Surena's Choker.
4) The Binding - Summon and kill the Voidwalker in the Lamb's basement.
Gnome
1) The Slaughtered Lamb - From your trainer in the Forlorn Cavern at Ironforge.
2) Head to Gakin the Darkbinder in the Mage Quarter Slaughtered Lamb Stormwind
3) Surena Caledon - You can find her at the farm southwest of Eastvale Logging Camp in Elwynn, you'll need to loot Surena's Choker.
4) The Binding - Summon and kill the Voidwalker in the Lamb's basement.
Orc & Troll
1) Gan'rul's Summons - from Ophek in Razor Hill.
2) Head to Gan'rul Bloodeye in the Cleft of Shadow, Orgrimmar.
3) Creature of the Void - Head to Skull rock, its the cave east of orgrimmar's gate. Once inside, hug right (or left if you can do the jump at the end) and loot the tiny chest at the end of the cave.
4) The Binding - Head to the summoning circle in the hut next to Ragefire Cavern entrance and use the Glyphs of Summoning item provided to summon and kill the Voidwalker.
Undead
1) Halgar's Summons - Head upstairs at the Brill inn and grab the quest from Ageron Kargal.
2) Head to Carendin Halgar at the Mage Quarter in Undercity.
3) Creature of the Void - Egalin's Grimoire Is in a chest inside the scarlet tower to the left of Undercity. 4) The Binding - Use the Runes of Summoning item provided next to Carendin Halgar to summon and kill the Voidwalker.
Succubus Quest - Level 20
Human / Gnome
1) Gnomes starts at Lago Blackwrench in The Forlorn Cavern, Ironforge. Humans go straight to Gakin the Darkbinder in the Mage Quarter Slaughtered Lamb, Stormwind.
2) Devourer of Souls - Gakin sends you to Takar the Seer in the Barrens, close to Camp Taurajo (49.2, 57.0)
3) Heartswood - Head to Maestra's Post in ashenvale it is south of the Darkshore / Ashenvale border. Head directly North East of Maestra's Post to The Ruins of Ordil'Aran and there you will find a tree you can interact with called "Heartswood" which is the item to complete that quest.
4) The Binding - Head back to Gakin in the Mage Quarter Slaughtered Lamb, Stormwind, summon and kill the succubus in the basement.
Orc / Troll
1) Devourer of Souls - Speak with Cazul.
2) Blind Cazul - Head to Zankaja the exit of the Cleft of Shadow (37, 59.6).
3) News of Dogran - Head to Gazrog at the Crossroads.
4) News of Dogran - Head to Ken'zigla in southern Stonetalon.
5) Ken'zigla's Draught - Head to Grunt Logmar at Camp Taurajo.
6) Dogran's Captivity - Head to Grunt Dogran, slightly north of Camp Turajo (43.2, 47.8).
7) Love's Gift - Head back to Orgrimmar.
8) The Binding - Go to Neeru Fireblade's Tent just outside Ragefire Chasm, use Dogran's Pendant that was provided to you to summon and kill the succubus.
Undead
1) Devourer of Souls - Head to Godrick Farsan, just north of Carendin.
2) Hearts of the Pure - Kill Dalin Forgewrite at the bottom of Silverpine around The Greymane Wall and Kill Comar Villard on the north entrance path in the Wetlands
3) The Binding - Go back to Carendin the Magic Quarter in Undercity, Summon the succubus at the summoning circle next to him and kill the succubus.
Incubus Quest:
Alliance
1) What is Love? - Get the quest from Takar the Seer in the Barrens, close to Camp Taurajo (49.2, 57.0)
2) Head to Maestra's Post in Ashenvale (26.4, 21.8), on the table next to the house grab the torch and light it either by making yourself a campfire or head to (14.8, 31.2) near The Zoram Strand where you can also find a campfire nearby accompanied by "Talen". Once lit throw the burning torch to the cart next to the table where you picked up the torch. Then run inside the house and head upstairs to loot the "Wooden Figureine" Then head back to Gakin in the Mage Quarter Slaughtered Lamb, Stormwind.
3) The Binding - Use the Wooden Figurine on the summoning circle to summon and kill the Incubus.
Horde - Initial quests are Picked up from respective class trainers can do either chain as any race.
Orgrimmar: 1) Love Hurts - Speak with Magar in Orgrimmar
2) Wish you were here - Head to the Fallen Sky Lake in Ashenvale close to the border of barrens ( and kill the Shadethicket mobs and loot "Withered Scarf" to complete the quest.
3) The Binding - Use the Withered Scarf to summon and kill the incubus.
Undercity:
1) Hearts of the Lovers - Head over to Ambermill in Silverpine Forest (63.4, 65.4), kill Avelina Lilly and loot "Avelina's Heart". Then head over to Ratchet in the Barrens (61.8, 38.6) to Kill Isaac Pearson and loot "Isaac's Heart".
2) The Binding - Use the "Lover's Hearts" to summon and kill the incubus.
Felhunter Quest - Level 30
Human / Gnome
1) Head over to Gakin the Darkbinder in the Mage Quarter Slaughtered Lamb, Stormwind
2) Seeking Strahad - Head over to Strahad Farsan in ratchet in the Barrens behind the goblin buildings on the hill. (62.6, 35.6)
3) Tome of the Cabal - Head over to Krom Stoutarm at the Halls of Explorers in Ironforge. (74.4, 9.4)
4) Tome of the Cabal - Retrieve the "Moldy Tome" and "Tattered Manuscript", you will find the Moldy Tome west of Southshore in Hillsbrad Foothills (27.8, 72.8), you may utilize your voidwalker to send your pet on the murlocs to buy you enough time to loot the tome, or kill the murlocs. The Tattered Manuscript is inside Splithoof Hold in Thousand Needles (44.3, 36.8), go inside the cave and stick to the right at every fork and loot the "Damaged Chest" on the ground.
5) Tome of the Cabal - Loot 3x "Rod of Channeling" from Dragonmaw Bonewarders and Dragonmaw Shadowwarders in the Dragonmaw Camp, Wetlands. (48, 46) Then head back to Strahad Farsan in Ratchet to hand in the quest. (62.6, 35.6)
6) The Binding - Follow Strahad Farsan he will place a summoning circle on the ground, use the "Tome of the Cabal" to summon and kill the Felhunter. Wait for Strahad Farsan to walk back then you will be able to hand in the quest.
Orc / Troll / Undead
1) Orcs and Trolls start at Gan'rul Bloodeye in the Cleft of Shadow, Orgrimmar, Undeads start at Carendin Halgar at the Mage Quarter in Undercity, both quests are called Seeking Strahad.
2) Seeking Strahad - Head over to Strahad Farsan in ratchet in the Barrens behind the goblin buildings on the hill. (62.6, 35.6)
3) Tome of the Cabal - Head over to Jorah Annison in the Mage Quarter, Undercity. (75, 37)
4) Tome of the Cabal - Retrieve the "Moldy Tome" and "Tattered Manuscript", you will find the Moldy Tome west of Southshore in Hillsbrad Foothills (27.8, 72.8), you may utilize your voidwalker to send your pet on the murlocs to buy you enough time to loot the tome, or kill the murlocs. The Tattered Manuscript is inside Splithoof Hold in Thousand Needles (44.3, 36.8), go inside the cave and stick to the right at every fork and loot the "Damaged Chest" on the ground.
5) Tome of the Cabal - Loot 3x "Rod of Channeling" from Dragonmaw Bonewarders and Dragonmaw Shadowwarders in the Dragonmaw Camp, Wetlands. (48, 46) Then head back to Strahad Farsan in Ratchet to hand in the quest. (62.6, 35.6)
6) The Binding - Follow Strahad Farsan he will place a summoning circle on the ground, use the "Tome of the Cabal" to summon and kill the Felhunter. Wait for Strahad Farsan to walk back then you will be able to hand in the quest.
Tips & Tricks
Wand is mandatory for early levels. Earlier you get it, the easier it gets.
Don't heal the pet, re-summon a new one. If you took Soul Harvest, use rank 1 
Drain Soul to proc it. Managing Fear, Utilize 
Curse of Recklessness on a feared mob if it took a very bad path. Curse of recklessness makes it so the target will ignore fear and horror effects which makes it very useful if a mob is feared and takes a bad path, press any other curse ability to cancel the fear immunity effect.
Additional Tips
At level 40 we reach the most exciting addition, in Demonic Pact. It lets us use Demonic Sacrifice on our Demon to get its benefits and then use another Demon too. There are quite some crazy combinations, but for leveling we believe by far the strongest is sacrificing a Felhunter and using Succubus as your main pet. At this stage we also become basically unkillable with 30% damage reduction from Soul Link and 3% of your hp regen every 4 sec, while your Succubus is doing crazy dps.
After Demonic Pact we have an option to go full dps and spend rest of the points in destruction to unlock 
Agonizing Flames which synergizes very well with Demonic Brand.
Other option is to go for comfort, hit chance (which will start becoming noticeable at these levels), mana and cast range.
Its up to you in which order you reach these talents. We would recommend Improved Corruption first and then any of these Suppression, 
Grim Reach, Bane, Destructive Reach 
Cataclysm 
Improved Life Tap or even 
Molten Skin for PvPers.
Affliction
Destruction
Shaman
Enhancement