Get youself a +blizzard wand/staff, lore helmet, +cold/sorc amulet and fill your armor with ptopaz and start farming Mephisto, you should be able to be decked out decently pretty fast.
Occy
Vipermagic
Trang'Ouls Claws/Magefist
Harlequins
+3 Cold Ammy
2 10% FCR rings
Crafted Caster Belt (for those last 5% FCR)
Whitsans Shield/Moser's Shield
Resist Boots
Is all fairly cheap and easy to get once you can slay mephisto easily, USE THE MOAT TRICK. It should let you get started with PKing with a Blizz Sorc, to turn it into MF then just swap the Vipermagic and Belt for Skulder's Ire and Goldskin (both cheap too).
