Level 95 Crit Ice Trap Occultist^3.21

Notes

Bossing vs Mapping

For Bossing:
Use Zealotry instead of Determination
Use Atziri's Promise instead of Granite Flask
Use Steelskin on left click instead of Molten Shell
Allocate Whispers of Doom for a third curse and add Assassin's Mark (only if you're totally focused on bossing - for normal bossing, you don't need to have three curses)
Allocate Charge Mastery - 100% increased Charge Duration (helps you maintain charges during phases)

Balanced Mapping:
Use Determination and Molten Shell on Left Click. Only use Hatred with Divine Blessing - you don't need more damage for mapping
Use Granite flask
Allocate 3% increased damage per charge Charge Mastery

Explode Version:
Unallocate Unholy Authority, Allocate Profane Bloom
Only use ONE curse (max will only be one now) and use either Profane Proxy for auto-curse, or Arcanist Brand-Faster Casting-Hex Bloom
Very fun, but I haven't tested it extensively. Use at your own risk :) 
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Uniques:
Heatshiver (Helmet): MVP ITEM
This adds an absurd amount of damage (about 60% MORE). This is unbeatable for increased DPS, especially if you can get +1 Power Charges and an enchant

Slavedriver's Hands vs Architech's Hands: (Gloves)
Both have the cast speed = trap throwing speed mod that we need, but Architechts mean we don't need use life to throw traps
since we already have recovery issues, I'd prefer to use Architecht's Hands, however, I don't feel like this build needs either and we can make better use of life/res/suppression gloves

Void Battery (Wand):
Great wand, usually fairly cheap. More power charges, increased crit chance is a win. However, a really nicely rolled +1 or +2 with crit multi/crit chance, spell damage/non-chaos as extra chaos
can produce comparable damage 

Tinkerskin (Body Armour):
Life recovery per trap triggered helps a lot. Phasing is great, and it has decent ES and Evasion

Gravebind (Gloves):
These gloves allow us to make use of Profane Bloom, if we want to have better clear for mapping. This is because kills are attributed to us, instead of our traps, which means that
Profane Bloom can proc. 
This also allows us to make use of a Life Gain on Hit Vitality Watcher's Eye to further help solve recovery
If you like, you can also use Profane Proxy with a curse to "auto curse" enemies to help explode more easily, or you can keep using Hexbloom with Arcanist Brand, a single curse, and Faster Casting

Elevore (Helmet): 
Great, early helmet that will help you cap suppression and possibly even 


Badge of the Brotherhood (Amulet):
Great amulet option, especially if you use 2x Void Battery for bossing. Also allows us to save 4 points because we don't need to allocate Frenetic and Fervour
That being said, a +1, or +2 amulet with resistances, attributes etc will probably be more comfortable as we won't have to find those modifiers on other gear

Dialla's Malefaction (Body Armour):
Placing Empower and Ice Trap in red sockets can give us easy access to a massive increase to the level of our Ice Trap. Only use for the bossing version as the damage
will be overkill for mapping and you'll probably need to find resistances and life on other pieces of gear to accommodate this. 

Ashes of the Stars (Amulet):
Great amulet overall. More damage, more reservation, but expensive and hard to get on league start

Stormshroud (Viridian Jewel):
This can help us get Ailment Immune if we use an Essence of Torment on a pair of boots and roll the reduced chance to be shocked/avoid elemental ailments implicits on boots

Flasks:
Atziri's Promise:
Great for increased damage. Only use when bossing

Boots:
Ralakesh's Impatience (Boots):
These boots will instantly set you to max charges while stationary. The way we use this is we place them on our character at the start of a boss fight, then put our normal boots back on while
the boss is still spawning. This way, you'll start the fight at maximum damage. Try to not place your auras in your boots if you use this tech as it will mean you have to turn your auras back on
after placing your normal boots back on after swapping with Ralakesh's Impatience
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Important Notes:

BELT CRAFT: 
Regenerate 150 Energy Shield Per Second While a Rare or Unique Enemy Is Nearby: This will help our ES regeneration massively during boss fights.
Since we're using Eldritch Battery, this is important so we don't run out of "mana"
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Map Mods to Avoid:
Players have reduced recovery - this is AWFUL. Instant reroll

Elemental Reflect: While our traps will not kill us with reflect, your Frost Blink and Frost Bomb WILL kill you if you use them on a pack of monsters. If you cannot reroll this mod, unequip these skills temporarily 

Monsters steal charges on hit - this is annoying and will reduce our damage hugely, but these maps are still able to be completed

Increased crit chance/multi: Death

Additional Projectiles: Death
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FAQ:
>WHY ARENT YOU USING TRAP AND MIEN DAMAGE SUPPORT?
While this gem does add more damage in PoB, the less trap throwing speed drawback is VERY noticeable. However, with Architecht's/Slavedriver's Hands, you can use this gem
in place of one of the others, but I don't feel it's necessary.

>WHY ARE U USING FROSTBLINK WHEN FLAME DASH HAS 3x MORE CHARGES?
Frostblink has an instant cast time. Our trap throwing speed isn't incredibly fast, so having this instant cast skill to dodge boss attacks
is very helpful. You can use Flame Dash if You Prefer

>WHY ARE YOU PLAYING OCCULTIST WHEN SABOTEUR HAS SO MANY TRAP TALENTS?
Occultist does more damage and this is more fun :) 

>WHY NO BRITTLE GROUND BOOTS?
We can get almost crit capped in other ways that don't involve jebait PoB tech that doesn't have 100% uptime

>WHY NO CLUSTER JEWELS?
You can use some if you like, but I feel like we have to remove a lot of utility and survivability to fit these in. If you go full boss mode, you can check out the Cluster tree I added, but note that
I have not personally tested this in game.

>WHY ARE YOU NOT USING ARCANE SURGE WITH FLAME DASH/FROSTBLINK?
We're using Eldritch Battery. If you really want Arcane Surge, you can get it from a Zealotry Watcher's Eye or go play Heirophant instead. (ALSO THIS GOT NERFED IN 3.21)

>Why do we use Determination instead of Zealotry/Hatred all the time?
Dying in PoE sucks and without armour, you will die. I prefer using Determination over Zealotry for mapping so we have some armour to mitigate incoming physical hits. If you don't care about dying
use Zealotry/Hatred all the time

>Why is Molten Shell disabled in PoB?
I only disable it so it doesn't inflate the EHP numbers. Use it on left click, but just note that it won't be up 100% of the time unless you cast it manually
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Important Notes:

BELT CRAFT: 
Regenerate 150 Energy Shield Per Second While a Rare or Unique Enemy Is Nearby: This will help our ES regeneration massively during boss fights.
Since we're using Eldritch Battery, this is important so we don't run out of "mana"
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LEVELING: 
Act 1:


After opening submerged + hailrake:
Chance to Poison Reward (Nessa)
Frostbomb Reward (Tarkleigh)
Frostblink Reward (Tarkleigh)
Orb of Storms (Buy - 1 Scroll) 
Holy Flame Totem (Buy - 1 scroll) 
Swift Assembly (Buy 1 Scroll

Frost Blink
Stormblast Mine - Swift Assembly (BG)
Frost Bomb + Orb of Storms + Arcane Surge  BBB 
HFT - Chance to Poison if you want  R G

Lower Prison:
Added lightning damage - Add to Stormblast Mine (BBG)

After Brutus:
Flame Dash - Reward (Tarkleigh)

Recommended:
2x Sapphire Rings for Merveil
Jade Amulet
Upgrade Flasks

Tree: Rush Ele Overload
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Act 2:
Drop TP at The Den -> Get Crossroads Waypoint -> Go to town -> Take portal and do Den quest for second quicksilver

Herald of Thunder: Gruest Reward (Save Helena)
Buy: Summon Skitterbots
Buy: Wave of Conviction
STOP USING: Holy Flame Totem

Kill All Bandits (Can do Alira if you like, Multi + Resistance is great)

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Act 3:
Frostbite
Ice Trap - Added Lightning - Ele Focus - Swift Assembly BB GG  (Controlled Destruction is bait - it will mean you almost never crit so your Ele Overload won't proc)
Alternatively: Ice Trap - Ele Focus - Swift Assembly - Added Cold - the main thing is to get a 4L here to use this  GGGB
Drop: Orb of Storms, Wave of Conviction, Herald of Thunder. 
Add Frost Bomb to apply exposure
Add Frostbite as a curse
Add Herald of Ice (you won't get explosions, but it adds some damage)

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Act 6:
Can use Purity of Elements if you are very low on res - drop skitterbots/herald
Can use Hatred + Skitterbots after taking skitterbots reservation mastery + Influence wheel if you want more dps
Buy up other gems required for build and put in off hand/open sockets to level them up
Can also add Clarity while leveling to help with mana. I added it around Act 9 after allocating Charisma and it allowed me to drop my mana flask entirely

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End of Campaign:
Elevore is great - by the end of campaign, we can get practically suppression capped with this item and a few nodes on tree (93-98%, Quartz Flask + Revenge of the Hunted will carry the last few %)

Elemental Overload: Once we allocate two power charge nodes, we can drop Elemental Overload, and start using Charged Traps instead of Trap and Mine Damage

We should be getting enough damage from links and the tree and gem levels to now focus on defences - we want to level up and make it through early maps without continually dying - we don't need insane
DPS at this point - just stay alive. That is why I have prioritised spell suppression and also some chaos res on the tree, instead of instantly rushing for as much Crit Multi as possible. Dying slows you down more
than you might realise and we don't need massive single target just yet.


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Sockets

6 Ice Trap
3 Shield Charge - Faster Attacks - Frostblink/Flame Dash
3 Hatred - Divine Blessing - (Inspiration/Steelskin/Frost Bomb) 
4 Hex setup -  
4 Grace - Determ - Skitterbots - Enlighten 
4 Bear trap-Culling/ Vitality - Defiance banner

Note: Inspiration is great for Divine Blessing as it reduces the ES cost of Hatred with Divine Blessing. However, if you use it, you will have to drop one of these gems:
Culling Strike (linked with Bear Trap)
Steelskin/Molten Shell
Frost Bomb

Alternatively, for mapping, drop a single curse and put in steelskin/molten shell, but then you'll need a white socket