Frost Mage Best in Slot (BiS) Gear List - MoP Classic
Class
Spec
Phase
Gear
Slot
Source

Lightweight Retinal Armor
head
Crafting
Engineering

Burning Necklace of the Golden Lotus
neck
Quest (The Golden Lotus - Exalted)
The Final Power

Whisperwind Spaulders

shoulder
Siege of Niuzao Temple
Wing Leader Ner'onok

Scorched Earth Cloak

back
Scarlet Monastery
Brother Korloff

Spelltwister's Grand Robe

chest
Crafting
Tailoring (Pre-Raid)
Bracers of Displaced Air
Bracer - Super Intellect
wrist
Stormstout Brewery
Ook-Ook
Spelltwister's Gloves
Gloves - Greater Haste
hands
Crafting
Tailoring (Pre-Raid)
Incineration Belt
waist
Scholomance
Darkmaster Gandling
Leggings of the Frenzy
Greater Cerulean Spellthread
legs
Gate of the Setting Sun
Commander Ri'mok
Soulbinder Treads
Boots - Pandaren's Step
feet
Mogu'shan Palace
Xin the Weaponmaster
Seal of the Lucid
finger 1
Quest (The Klaxxi - Exalted)
Shadow of the Empire
Vithrak, Gaze of the Deadman
finger 2
Scarlet Halls
Flameweaver Koegle
Relic of Yu'lon
trinket 1
Crafting
Inscription
Flashfrozen Resin Globule
trinket 2
Siege of Niuzao Temple
Vizier Jin'bak
Headmaster's Will
Weapon - Jade Spirit
weapon
Scholomance
Darkmaster Gandling
offhand
Stat Priorities
Hit = Exp (15%) > Haste (14242) > Mastery > Crit (23%)
These are general guidelines. Always sim yourself to get your own stat prios.