Synthesis

All classes:
x20 Heavy Runecloth Bandage
x5 Greater Fire Protection Potion

Elixirs and food should be used before pull of each boss

Rogues + Fury Warriors:
Major Healing Potion
Elixirs of Giants
Mongoose
Winterfall Firewater
food: Grilled Squid (Warriors can use Blessed Sunfruit instead selling from Argent Down vendor if you have revered reputation)
Warriors:
Elemental Sharpening Stone (rogues should use it on Baron Geddon, Garr, Ragna instead of poisons cause Elemental bosses are immune to poisons)

Hunters:
Major Healing Potion
Major Mana Potion
Mongoose
food: Grilled Squid

Healers:
Major Mana Potion
food: Nightfin Soup / Runn Tum Tuber Surprise (optional for priests: Blessed Sunfruit Juice if you have revered with Argent Down)

Caster DPS:
Greater Arcane Elixir
Major Mana Potion
Elixir of Shadow Power (only warlocks and shadow priests)
food: Runn Tum Tuber Surprise

Tanks:
Major Healing Potion
Elixir of Superior Defense
Elixir of Fortitude
Gift of Arthas
Elixir of Giants
Elixir of the Mongoose
Winterfall Firewater
Rumsey Rum Black Label
Elemental Sharpening Stone
food: Grilled Squid (You can use Blessed Sunfruit from Argent Down vendor if you have revered reputation)

You'll have +10 GP for each missing elixir/food and it will affect each boss. WeakAuras will automatically check and alert players with missing buffs in raid chat.

Flasks, DM buffs, Blasted Lands quest buffs, Winterspring quest buffs and any other buffs ARE NOT REQUIRED BUT YOU'RE WELCOME TO USE IT !