All percentages, heroic raid.
Warrior Fury 82.66 127.04
Mage Arcane 79.47 130.01
Rogue Outlaw 78.73 114.71
Shaman Enhancement 78.67 131.56
Paladin Retribution 78.49 119.57
Warrior Arms 78.34 109.97
Monk Windwalker 76.03 111.09
Hunter Survival 75.35 109.84
Warlock Affliction 74.89 114.59
Death Knight Unholy 74.39 106.03
Notice that the top 10, all but 3 (if you count hunter as a caster) are ALL melee.
Honestly melee should do same if not better damage than ranged and I know that is controversial statement but playing melee involves more risk as well as requires uptime
I completely disagree as a DK player, also knowing the Blizzard literally programs in mechanics that specifically picks targets that are either a certain distance from the boss/mob (casters) or by class and spec (casters). As a DK player i dont feel anymore threatened than if im playing my Lock or Shadow.
But i respect your opinion.
So shadow priest is so OP everyone decided not to take one so as to not trivialize the content lol
cries
I remember when all the rets were dooming lol
what do these numbers represent?
Classes performing the best in current content (heroic raid) from warcraft logs.
thank you.
I’ll drag that average down for Rets a little bit 
I mean, your top 4 all got nerfed, and this is 100% pre-nerf data.
Oh come oooonnn. Youre better than you think!
First number is like an average second is the high roll