In this build, we need to understand to any reduced and/or increased duration to a spell applies to the soul gain prevention of the vaal skill. And switch spark to storm call when Boss fight.

Quick Jump

• Pros & Cons

• Skill Tree 

• Gems Setup

• Gear Setup

• Leveling Tips

Pros & Cons

Pros

• + Very very very VERY Fast
• + Not that expensive
• + Can be played as MF
• + INSANE clear
• + Shatter sound

Cons

• - Hard to get back in if you run out of charges
• - Can't do end-game content (Shaper, Uber Elder...)
• - Can't do ele reflect maps

Video

Skill Tree 

Ascendancy

Nature's Reprisal -> Master Toxicist -> Nature's Adrenaline -> Nature's Boon

Bandits

Alira for resists and Crit Multi.
Kill them all for the 2 skill points is also a good option, do as you prefer.

Pantheons

The Pantheon List

• Major : Soul of Lunaris (more survavibility)
• Minor : Soul of Garukhan (more movement speed) or Soul of Shakari (poison immunity)

Passive Tree

Note : If you have an Intuitive Leap jewel put it to the right of the Witch starting point and grab the "Overcharged" node to generate charges.
If you don't have one just spec into a 5% life node above the witch starting point.

Gems Setup

Single Target Help

To help with the single target DPS I use a Vaal Storm Call setup. I use it when I encounter the boss or a Betrayal Event.

Vaal Storm Call - Concentrated Effect - Increased Critical Strikes - Less Duration

Spark Setup

Pretty basic Spark links :

Vaal Spark - Increased Critical Strikes - Increased Critical Damage - Added Cold Damage - Pierce - Faster Projectiles

(If you have Lightning to Cold conversion (Call of the Brotherhood ring) swap out Added Cold Damage for Controlled Destruction. If you don't have Lightning to Cold conversion, you'll not shatter enough !)

Auras

We'll be using Herald of Ice for the shatter and Grace for the bonus evasion (more movespeed) and for the Watcher's Eye mod (more movespeed).

Herald of Ice - Innervate - Increased Area of Effect - Enlighten

Grace - Enlighten

Level 3 Enlightens will be enough to be comfortable.

If you can't afford 2 Englighten gems drop the Innervate or Increased Area of Effect with your Herald of Ice and should have enough mana to play comfortably.

Another option is to add Herald of Thunder to the build. You can do it by linking Grace and Herald of Thunder to a level 4 enlighten, (It kinda is necessary to have enough mana to be comfortable, best would be 2 but one is enough in my opinion) and by using a more usual Curse on Hit setup with Herald of Ice. We use Assassin's Mark as it gives Power charges generation and great survivability.

Herald of Ice - Curse on Hit- Assasin's Mark - Enlighten

Grace - Enlighten Level 4 - Herald of Thunder

CWDT Setup

Pretty basic stuff. I just added a Curse for more utility, it's really just a matter of personnal preferences, you can change the curse as you like.

Cast When Damage Taken - Immortal Call - Increased Duration - Temporal Chains

If you have a Solstice Vigil amulet :

Cast When Damage Taken - Immortal Call - Blasphemy - Temporal Chains

Utility

I chose to run Flame Dash and Phase Run linked to Blood Magic. Doing that i'm able to use both those skills during mapping.
Because the Soul Catcher flask prevents us from gaining mana, you'll run out of mana if you use the skills. Linking them to Blood Magic allows us to use them without spending mana, so you can spam them in your map ! :)

Flame Dash - Phase Run - Blood Magic

Spare Links

For the spare links I use a Portal Gem (really useful) and a Lightning Golem for the bonus cast speed.

Gear

Helm

For the helm, a rare one with 30% increased Spark Projectile Speed enchant.
Aim for life and resists

You can also use The Gull. It really helps with clear speed with the small shrines that it spawns.

Weapons

For the weapons, the only necessary mod is 20% reduced Souls Cost of Vaal Skills.

Shaped Daggers are BiS because of the Crit Chance they have as implicit.

Other usefull stats are Spell Damage, Damage to Spells, Critical Strike Chance for Spells, Elemental Penetration, Lightning Damage.
And with the crafting rework in Betrayal you now craft a lot of useful mods (Arcane Surge, Spell Damage/Extra Chaos...)

Amulet

For the Amulet the budget version would be a Bisco's.
BiS would be a shaped amulet with 10% quantity, life, spell damage, crit chance/multiplier and eventually resists.

Body Armour

QUEEN OF THE FOREST ! NOTHING ELSE !

This is where all the speed comes from. Plus it gives life and resists, what more do you want ?

Rings

For the rings I'd recommend a Ventor's Gamble (to cap out your resists) and a Pariah with a white sockets.
If you don't have the funds for these rings, just use rare ones with life and resists until you can afford them.

Gloves

For the gloves you can use Sadima's Touch for the quantity or rare ones with life and resists, or Shadows and Dust for the rampage bonus if you don't wear a Bisco's Leash in your belt slot.

Belt

Here you can use a Bisco's Leash with the sweat Rampage bonus.
Or a Perandus Blazon.

Best option would be a corrupted belt with %quantity as implicit, but it's really expensive.

If you have the funds you could also use a Headhunter, which is really the best option here as it gives you so many buffs (movespeed, damage etc...)

Boots

Goldwyrm, basic MF boots.

Or rare ones with life and resists if you're poor ! :p

Flasks

For the Flasks we're gonna use a Soul Catcher, a Jade Flask to get more evasion for the QoTF, a Diamond Flask for crit chance, a Quicksilver for movespeed and a Vessel of Vinktar for the leech and damage boost (Penetration or Damage to spells, both are fine but Penetration might be better in terms of DPS)

Jewels

And for the Jewels you'll want to use 2 Hazardous Research, a Conqueror's Potency to increase the bonuses of our flasks and an Abyss Jewel with the %chance to gain Onslaught on kill mod for the sweat sweat onslaught buff !

Stats for rare jewels are : Spell Damage, Crit Chance/Multi, Cast Speed, Life%

Non mandatory jewels are a Watcher's Eye with the Movement Speed mod with Grace and an Intuitive Leap to grab the node that allows us to generate Frenzy, Power and Endurance charges

Leveling Tips 

When you start a map you won't have charges for your Vaal Spark.

To generate them just kill one or two packs of mobs, but DO NOT USE YOUR SOUL CATCHER FLASK UNTIL YOU'VE KILLED ONE OR TWO PACKS OF MOBS !!

Otherwise, you'll run out of mana and you'll have to wait for the Soul Catcher Flask to run out to regen mana and start killing mobs again.

So just kill some mobs, then pop your Soul Catcher and you'll be ready to go !