Creeping Frost Occultist - 40-50 ex (3.17) - ~30 Mill Dps
4k life/1500ES, 70% phys reduction, 50% chance to evaid

By reaching maps your setup should look like this :

This setup with 4-Link would allow you to farm T1-T5 rare maps
Keep in mind that you cannot play ele reflect yet

Here

you can find detailed leveling guide

Setups :

*All items have promts and links on hover/click

Flask setup

Void Battery x2

Divine Flask with antibleed

Enduring Mana Flask

Jade Flask with antifreeze

Dying Sun

Gives us 2 additional projectiles which decently increases our dps

Ashes of the Stars

Should be purchased after helmet/gem
Gives us more projectiles for divergent creeping frost
When you have Helmet/Divergent Creeping Frost/Ashes of the stars - add Hatred to your setup
If the amulet is expensive - use the filter to decrease reservation roll to make it cheaper

We use Overcharge as anointment

Required Oils :

Highly increases your dps
One Battery grants quite the same amount of damage as Taryn's Shiver
If you have currency for only 1 Battery - buy it and use cheap wand with '+1 to level of all cold gems' till second Battery

Boots with Elusive on Crit

Flasks should have 'Used when Charges reach full' enchant
Use Instilling orbs and crafting bench to put the enchant on your flasks

Pantheon : Soul of Lunaris + Soul of Abberath
If you have not enough Str/Dext - take +30 nodes

You can buy a base and use Crit reforge in Harvest to guarantee Elusive
Use until you have Life/Res + Elusive and craft Movement speed/Onslaught on kill

You can buy a base and use Caster reforge in Harvest to craft it (requires 5-10+ tries)
Use until you have Frostbite on Hit 32% + Life or Res, Craft Life or Res

Crest of Desire and Divergent Creeping Frost

Adding both Helmet and Gem to your setup must happen at the same time
Helmet gives additional quality to socketed gems while the gem gives additional projectiles per 20% quality
You can have up to 5 additional projectiles (30-50% from helmet + 20% from gem itself + 30% from Ashes of the Stars)
Helmet with max level/qual rolls is very expensive, you want +8 levels/+30% qual at least
When you buy them you no longer need your old 6-Link, use Body armor for other gems
If you do not have enough currency to buy both the items - skip them and return later

Base Jewels

You should have ~90 Str/Dext on your gear to have enough stats for 20/20 gems

Searing Exarch and Eater of Worlds implicits :

Gloves

Freezes you inflict spread to other enemies (Searing Exarch)
Inflict Cold Exposure on Hit (Eater of Worlds)

You want 2 Crit Multi on it and Str/Dext if possible (check the filter)

Ring with Frostbite on Hit

Non-channelling spells have -7 to manacost craft is mandatory on both rings!
When you have the ring - remove Bane + Frostbite, leaving only Elemental Weakness
You can add Arcanist Brand to Elemental Weakness if needed

Body Armour with Spell Crit Chance

You can buy a base and use Crit reforge in Harvest
Use until you have Spell Crit chance/Life/Res and craft 'Gain 10% of Max Life as Extra ES'
I would recommend to buy it when you have helmet so you do not have to buy another 6-Link

*All items have promts and links on hover/click

Vaal Regalia (Spell Crit Chance/Frenzy on Hit/Additional Curse)

Inspired Learning

Increases clear speed
Take next notables to make it work

Crafting method :
Buy Vaal Regalia (6-socket/5-Link is enough, no need 6-Link)
Buy and use Hunter's Exalted orb on it
Use Crit Reforge in Harvest until you get T1 Spell Crit Chance (1.01% min)
(Make sure it is the only Hunter's mod on the item)
Buy any body armour with 'Frenzy on Hit'
(Make sure it is the only Redemeer's mod on the item)
Use Awakener's Orb (Left click on donor item > left click on Regalia)
Move to Crafting bench > Suffixes cannot be changed
Use Caster Reforge to add Additional Curse
Add '10% of max life as max ES' on crafing bench
When you get the item - Link Arcanist Brand(lvl1) and Sniper's Mark to Elemental Weakness

Flasks should have 'Used when Charges reach full' enchant
Use Instilling orbs and crafting bench to put the enchant on your flasks

Pantheon : Soul of Lunaris + Soul of Abberath
If you have not enough Str/Dext - take +30 nodes

This build was made generally for mapping
If you want more single target dps - remove Inspired Learning and spend the points on crit chance/crit multi on the tree
Remove Forbidden jewels and buy more base jewels

Jewels would make you immune to reflected elemental damage

Militant Faith Timeless Jewel (High Templar Dominus)

Devotion mods we are looking for :

If you do not have issues with capping ele res - take one with increased damage mods
Buy the cheapest and use Divine Orb to roll Dominus Variant
Make sure the jewel does not affect notables in radius and take Inner Conviction

4% increased Area Damage per 10 devotion
4% increased Elemental Damage per 10 devotion
+2% to all Elemental Resistances per 10 Devotion

Cluster Jewels

You should have ~90 Str/Dext on your gear to have enough stats for 20/20 gems

Searing Exarch and Eater of Worlds implicits :

Gloves

Chance to Unnerve enemies on Hit (Searing Exarch)
Inflict Cold Exposure on Hit (Eater of Worlds)

One large cluster should contain Blast-Freeze
When you have it - reroll Searing Exarch imlicit from 'freezes you inflict spread to other enemies' to 'chance to unnerve enemies on hit'
Jewels should contain Str/Dext if possible (check the filter)

Forbidden jewels

Watcher's eye with -10 to total manacost for non-channelling spells

This jewel would reduce all manacosts except Vortex to zero
You no longer need a manaflask which been used for maps with no manaregen
You can replace it with Diamond Flask with reduced curse effect
Make sure to have 'Frenzy on Hit' on your chest when you get Watcher's eye
Filter contains a couple of mods in addition to -manacost one
Check them and buy the cheapest one, if you are poor but want to forget about manaflask - remove dmg mod to make it cheap
You must have max roll on manacost (-10) and -7 on both rings for zero manacost
Add Clarity(lvl1) to apply minus manacost mod

Boots with Elusive/Tailwind on Crit

Crafting method :
Buy boots with Res implicit and Penetrate enchant
Buy and use Redeemer's Exalted orb on it
Use Crit Reforge in Harvest to get Elusive on Crit
(Make sure it is the only Redemeer's mod on the item)
Buy any boots with 'Tailwind'
(Make sure it is the only Redemeer's mod on the item)
Use Awakener's Orb (Left click on donor item > left click on main item)
Add 'Increased Movement speed/Chance to gain onslaugt on kill' on crafing bench

Determination Aura

To add Determination aura to your setup you would need to buy one Enlighten lvl3 for chest aura setup and one for Punishment Aura, also you should buy Awakened Blasphemy for Punishment aura as well
When you add the aura - replace Jade Flask with Granite Flask