This page is maintained to show how Affliction Warlocks and Demonology Warlocks compare in PvE end-game at level 80 — and was last updated for patch 12.0.0 of the Midnight Pre-Patch expansion.
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Note: Rankings are temporarily frozen during the Midnight pre-patch while SimulationCraft development focuses on Midnight end-game tuning at level 90.
Comparing DPS (Affliction Warlock vs. Demonology Warlock)
Anytime the game updates, we run simulations using BiS profiles and SimulationCraft to analyze the current meta of all specs in WoW. Below shows which spec had the highest DPS for each category. To view more information in a category, click the Details button.
Performance ComparisonPatch 12.0.0
Affliction+1.03% DPS
When simulating for maximum theoretical single-target DPS, Affliction Warlocks averaged 1.03% more DPS than Demonology Warlocks (+55K DPS).
Demonology+39.52% DPS
When simulating for light AoE DPS potential, with small waves of adds, Demonology Warlocks averaged 39.52% more DPS than Affliction Warlocks (+4M DPS).
Demonology+0.69% DPS
When upgrading the gear for both specs by +39 ilvl, Demonology Warlock DPS improved the most, +0.69% more than Affliction Warlock. In total, Demonology Warlocks DPS increased by 67.33% and Affliction Warlocks by 66.64%.
Affliction+2.24% DPS
When simulating for max single-target DPS with the new Single-Button Assistant, Affliction Warlocks averaged 2.24% more DPS than Demonology Warlocks (+103K DPS).
This category evaluates the burst DPS potential of each spec by simulating a short encounter with full raid buffs and bloodlust.
This category evaluates the solo DPS potential of each spec by simulating a typical solo delve encounter with no raid buffs.
This category evaluates the pure AoE DPS potential of each spec by simulating both specs to fight intense groups of adds, with nearly 16 adds at any given moment.
This category evaluates the performance of each spec when introducing occasional movement and stuns during boss encounters.
This category evaluates the latency tolerance of each spec by simulating both specs with moderate-to-high latency. This can indicate which spec performs better when facing high latency, whether due to far server/realm location or limited access to quality internet.
This category evaluates the skill level required to play each spec by simulating both specs with greatly reduced player skill. This can indicate which spec is more forgiving of mistakes or has a simpler rotation.
The comparisons above highlight some of the key differences between Affliction Warlock and Demonology Warlock in the current meta, which can hopefully help you determine which spec to play or group up with.
Affliction Warlockvs Demonology Warlock
Affliction+1.03% DPS 
Demonology+39.52% DPS