The buffs/debuffs that your casters need, with an X for ones they are getting:
X Bloodlust/Heroism
X Ferocious Inspiration (BM Hunter)/Sanctified Retribution (Ret Paladin)
X Improved Moonkin Form (Balance Druid) / Swift Retribution (Ret Paladin)
X Elemental Oath (Ele Shaman) / Moonkin Aura (Balance Druid)
Wrath of Air Totem (Shaman, prefer elemental)
X Totem of Wrath (Elemental Shaman)
X Totem of Wrath (Elemental Shaman) / Heart of the Crusader (Ret Paladin) / Rogue Skill (can't remember)
Improved Scorch (Arcane or Fire Mage) / Improved Shadow Bolt (Affliction Warlock / Winter's Chill (Frost Mage)
Curse of Elements (Warlock) / Earth and Moon / Ebon Plaguebringer
Improved Faerie Fire (Balance Druid) / Misery (Shadow Priest)
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Shaman =
Wrath of Air
I don't know why they wouldn't be dropping this. I don't see the buff being listed on the fights but it may be a display issue in WWS. On your next boss fight I would check and see whether you are getting this one, it's a pretty important buff.
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You are missing the 5% spell critical strike debuff in all the fights I looked at.
Mage =
Improved Scorch
Mage =
Winter's Chill
Warlock =
Improved Shadow Bolt
Fire scales better with haste than Arcane does, but even an Arcane Mage should be able to spec for Improved Scorch (never make them go Frost). Your Warlocks aren't going to want to go Affliction if they love the Destruction playstyle but it's much faster/easier for an Affliction lock to apply Imp Shadow Bolt than for a Mage to do Imp Scorch.
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I have been unable to find a fight where the magic damage debuff has been applied. The Moonkins are the easiest unless you have an Unholy Death Knight of in the raid. I believe EJ instructs Moonkin DPS'ers to ditch this talent and Imp Faerie Fire in favor of higher DPS personal abilities but they also assume someone has the job covered. In your raids it looks like no one is manning the post.
Warlock =
Curse of Elements
Death Knight =
Ebon Plaguebringer
Druid =
Earth and Moon
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You aren't getting the bonus spell hit buff. This is especially sad considering your Moonkin in some of the fights are missing spells at a rate of more than 3%. If you don't have a Shadow Priest your Feral Druid is going to have to skip using Faerie Fire as a threat move so your casters can be fully buffed out.
Shadow Priest =
Misery
Balance Druid =
Improved Faerie Fire
---- Final Thoughts ----
There may be sub-optimal rotations and gear involved. There is little point in working through those if they are missing the most important buffs to their abilities. In most of these cases they have picked the highest personal DPS spec instead of the highest raid DPS spec and it means all of them are going to be gimped. The Warlocks are doing pretty well but what you are looking at is DPS barely above what you'd get from fighting a Heroic Target Dummy while self buffed. Get a debuff/buff filter (I am using Dfilter to see the debuffs) and look and see how many of the above buffs are missing.
Your melee has the advantage because they don't require much or any loss in personal DPS for the raid DPS bonus. If you are going to be running buffless like that you might think about replacing the casters with Hunters for ranged (or at least threatening that hehe).
Added Note: I kept looking through the WWS. Because you are so physical DPS heavy I was unable to find any fights where they were getting more than half of the caster raid buffs. Most of them in the Ulduar 25 runs they are getting less than 1/4 th of the raid buffs that theorycrafters assume when doing the checkboxes, in a couple places they are only getting their self-buffs. The Naxx 25 runs are better distributed between melee/casters which is why the casters are doing better in those runs.