The following compares the current state of Arms Warriors to Elemental Shamans using the latest SimulationCraft data for end-game PvE in World of Warcraft The War Within patch 11.0.2.
Comparison
Category
Winner
Elemental Shaman
+0.5%
When simulating boss fight encounters, Elemental Shamans averaged +7,528.31 more DPS than Arms Warriors, a 0.5% increase.
Elemental Shaman
+44.55%
When simulating AoE DPS, Elemental Shamans averaged +2,311,807.24 more DPS than Arms Warriors, a 44.55% increase.
Arms Warrior
+49.37%
Arms Warriors have higher burst damage potential, achieving +4.0M more DPS than Elemental Shamans.
Note: this is the highest temporary DPS achieved in any given moment and is not sustained DPS.
Arms Warrior
+0.24%
+44 ilvl improved the DPS of Arms Warrior by 67.21%.
+44 ilvl improved the DPS of Elemental Shaman by 66.97%.
When comparing how both specs scale with gear, Arms Warriors had a higher DPS increase, a +0.24% higher increase than Elemental Shamans.
Arms Warrior
+10.77%
+ Movement and latency lowered the DPS of Arms Warrior by 4.61%.
+ Movement and latency lowered the DPS of Elemental Shaman by 15.37%.
When introducing occasional movement and real-world latency, Arms Warriors were less affected with a 4.61% decrease in DPS, whereas Elemental Shamans suffered a higher loss of 15.37% DPS.
Elemental Shaman
When evaluating abilities used during boss encounters, Elemental Shamans had fewer damaging abilities in total, indicating a potentially less complex rotation.
The comparisons above highlight some of the key differences between Arms Warrior and Elemental Shaman in the current meta, which can hopefully help you determine which spec to play or group up with.