Parse numbers from Mythic EN are interesting.
https://www.warcraftlogs.com/statistics/10#
Out of 467,705 DPS spec parses there seems to be two clear winners. Two specs have together more than 25% of parses. How is this even possible?
Mage Fire ........... 13.92%
Hunter Marksmanship . 13.02%
Rogue Assassination .. 7.47%
Demon Hunter Havoc ... 7.23%
Priest Shadow ........ 7.18%
Shaman Enhancement ... 6.19%
Druid Balance ........ 6.09%
Warlock Destruction .. 5.15%
Paladin Retribution .. 4.64%
Death Knight Unholy .. 4.18%
Warrior Arms ......... 3.48%
Monk Windwalker ...... 3.46%
Warlock Demonology ... 3.39%
Warrior Fury ......... 2.37%
Shaman Elemental ..... 2.33%
Druid Feral .......... 2.17%
Death Knight Frost ... 2.07%
Hunter Beast Mastery . 1.88%
Rogue Outlaw ......... 1.64%
Rogue Subtlety ....... 0.68%
Warlock Affliction ... 0.56%
Mage Arcane .......... 0.50%
Mage Frost ........... 0.27%
Hunter Survival ...... 0.14%
Total .............. 100.00%