[3.20] Frostbolt Ice Nova Hierophant | A blast from the past | 90M DPS

Basic overview of the most important offensive aspects of this build
1) Scaling Mana together with Transfiguration of Mind, Sanctuary of Thought and arcane cloak, gives us alot of %damage, aoe and flat lightning damage
2) We get 6 min/max power charges with Conviction of Power, the tree and the helmet. These scale our crit chance and give a nice damage multiplier with Inner Conviction (Millitant Faith)
3) We use Anathema to apply 4 offensive curses
4) low life
5) cast speed from tree, tailwind, onslaught, gems and jewellery

1) decent mana pool with MoM
2) 78% max all ele res (chest + militant faith)
3) Petrified blood for low life and bigger max hit taken due to MoM
4) HP and mana recoup to counter petrified blood degen
5) Sanctuary of Thought

Weapon
Pledge of Hands with high spell damage and ele damage enchant.
This gives us two extra repeats on ice nova without any downside.

Helmet
Blizzard Crown with +1 maximum power charges, nearby enemies have -9 cold resistance (go for the elevated -12 if you have the money) and ice nova damage enchant. The rest is pure luck when using the awakener orb. Look for life and resistance. (We don't need/can't even use aspect of the spider. This was just a leftover from another build)

Another good option is eye of malice with ice nova enchant and +1 max power charge corruption (don't know how well the "nerby" feels though).

Body Armor
We use a sacrificial garb since we can use vaal ice nova.
We take elevated all res, elevated spell crit and some other good defensive mods.
Crafting my chest:
1) Get elevated spell crit/elevated all res, with one of them being on a sacrifical garb
2) Awakener orb them together
3) Hope for open prefix -> suffiex cannot be changed -> reforge fire. We will get phys taken as fire if we had full suffixes, otherwise we can go again with full suffixes
4) suffixes cannot be changed -> aisling -> hope it doesn't remove phys taken as fire -> unveil %life/%mana
5) craft life

Gloves
Gloves with temple mod, high dexterity, another resistance, life and mana. Cold exposure and unnerve as implicits.
Crafting my gloves:
1) Buy Gloves with high item level and temple mod, high dexterity and another high res. The temple mod can be any res temple mod
2) Harvest res swap for the desired cold damage temple mod
3) Eldritch currency for prefixes
4) eldritch implicits

Boots
Elevated tailwind, elevated onslaught, elusive, ms boots (Fugitive if you have enough res). These boots give us alot of cast speed which is key to make the build feel well.

Amulet
+2 amulet with crit multi, cast speed and minimum frenzy charges.
Crafting this amulet:
1) get a crit multi fracture with your desired base (fix attributes)
2) alt/aug for +1 all
3) regal
4) if you hit a prefix, go to step 5, otherwise suffix to prefix
5) cannot roll attack + harvest add/remove cold (this can remove +1 all if you are unlucky -> go again from 2)
6) prefixes cannot be changed -> reforge caster (hope for open suffix) until you hit good cast speed and an open suffix (you can use harvest add/remove if you want to be on the safe side but getting high cast speed might take a few tries). Otherwise go for aisling/veiled chaos and take double res/double attributes or attack/cast speed
7) craft min frenzy

Ring 1
Anathema for all offensive curses.

Ring 2
Double recoup ring with mana, res and cast speed.
We need the recoup to completely counter the petrified blood degen. This stat might not be necessary when you don't use the 10% increased life mastery.
Mana recoup turns out to be not that great, so you can ignore it.
Crafting my ring:
1) Get a life recoup fracture
2) spam cast speed essence until t1 res
3) suffixes cannot be changed veiled chaos -> unveil mana recoup
4) craft life

Belt
res, life, %life, mana stygian.

abyss jewel
life, mana, attributes and cb

Flasks
1) Instant life flask
2) Lavianga's spirit for nice mana regen
3) bottled faith for crit and damage
4) diamond flask for crit
5) quicksilver flask

for a more defensive option, swap the diamond flask with progenesis

Jewels
1) Grand spectrum with min frenzy and %life to get to 3 min frenzy charges
2) Massive thread of hope
3) Double clarity watcher's eye/mom clarity plus zealotry is probably better
4) Militant faith for inner conviction
5) Blanketed snow, prismatic heart, widespread destruction large cluster
6) Megalomaniac with blanketed snow, pressure points

notes for militant faith
1) Try to get a good node in the herald wheel to get the life reservation mastery
2) We need one minimum power charge

Vaal ice nova
Straight forward most dps. Divergent vaal ice nova level 21 might be hard to get, so take a normal 21 vaal if thats cheaper.

Petrified blood
We reserve petrified blood with our life pool. Together with Anomalous Arrogance, enlighten lvl 4 and the life reservation mastery, we get to 50% life reservation for petrified blood. Together with a lvl 1 clarity, we get to 49% for permanent low life.
Petrified blood, together with mom, gives us a really nice defensive boost since we don't reserve 49% of our ehp pool (just our hp pool).

Arcanist brand
Applies all our curses. Use enfeeble instead of enhance if you want to get
a little bit more defensive power for bosses.

Zealotry
Our damage aura together with eternal blessing.

Arcane cloak
Together with a high level arcane surge gives huge dps boost.

Frostbolt
With gmp to cast ice nova on. Use divergent for (uber) bosses and change to anomalous/superior if you do alot of maps.

Frostblink
We use frostblink together with bonechill. I really don't like frostblink for bosses but this is the only remaining way to apply bonechill.

Uber Maven: https://www.youtube.com/watch?v=zo-U1hh79uo