Weapon
You can use almost any 1 handed melee weapon you like, the main stat you want is “Gain Physical Damage as Extra Cold Damage” and 1 open suffix so you can craft Increased Cold Damage on top of that
You can also use The Princess or Ewar's Mirage until you can buy a good weapon
Shield
This is your main source of damage, you'll want at least 2400 armor on a rare shield for the endgame, you can use Lioneye's Remorse and then Magna Eclipsis until you can afford the rare shield
Chest
You can use a rare chest until you can afford a Lioneye's Vision, the built in pierce will allow you to slot in Cold Penetration instead of Pirece
Helmet
A rare helmet with life and resists is what you'll want, you can add accuracy here if you want, Cold Penetration or Shield Throw damage would be very nice to have but not needed to handle all content
Boots
A rare with movement speed, life and resists is all you need
Gloves
You can use Hrimsorrow or Hrimburn here until you find a watchers eye with “>35% of Physical Damage Converted to Cold Damage while affected by Hatred” to take care of your conversion
Your top priority is to get cold conversion here followed by life and attack speed, you can also get accuracy or resists here if you can afford it
Belt
You can use a rare belt with life and ele/cold damage but The Nomad would be the best in slot for your belt
Amulet
You'll want “Gain % Physical Damage as Extra Cold Damage” and life in this slot, you can also get accuracy and resists here if you need to fill those out
Ring
The Mark of Submission with Projectile Vulnerability would be best in slot here
Ring
You'll want to fill out your life and resists here, Increased ele damage or attack speed is nice too but optional
Jewels
Divide and conquer is the centerpiece of the build, you'll want to slot it on the far right as soon as possible, take it out when fighting Atziri
Watcher's eye with “>35% of Physical Damage Converted to Cold Damage while affected by Hatred” is going to be part of your endgame, everything else on the gem is negotiable
Remaining jewels can be anything with Global Physical damage, Cold Damage, Ele damage or Attack speed
Flasks
The only flask you NEED to have is staunching flask, everything else like a Wise Oak, Taste of Hate, Atziri's Promise and Kiara's is optional
You don't need a heat flask, this build is tanky enough to just straight up out-wait being frozen without dying even though it would be nice to have