[3.20] Lifestack Hexblast Miner

Hexblast is a spell with slow cast speed, which we ignore by using it with mines, very low critical strike chance, which we improve mostly by using Rathpith Globe, but what makes this spell really unique is that it hits the lowest reistance instead of chaos resistance.
Examples:
1) We use lvl 20 Despair on target with 0 chaos resistance and 0 elemental resistances - it will result in target having -30 chaos resistances and hexblast will choose target's chaos resistance.
2) We use lvl 20 Frostbite on target 0 chaos resistance and 0 elemental resistances it will result in target having -37 cold resistances and hexblast will choose target's cold resistance
So this is why for our curses we choose elemental weakness + frostbite. You can play with conductivity or flammability but frostbite supposedly gives us more stable freeze but I never tested that and it shouldn't really matter.
Nevertheless hexblast's damage will still be chaos and we can still benefit from wither stacks.

Why it is Hexblast - spell deals 100% more damage if target is hexed and removes hex after, that is why we use blasphemy - so enemy is hexed all the time.. You could also use Summon Skitterbots with Profane Proxy, but we're too fast for skitterbots to catch up with us, although it is an option for bossing.

About AoE part of Hexblast:
Hexblast has 2 parts of damage - hit and AoE around target. They don't overlap and increases to AoE damage only affect that AoE. This AoE explosion does not deal damage to primary target of the skill.

Green arrow signifies primary damage to target. Hollow red arrows signify AoE damage around the target - this damage will not be dealt to primary target.

Minefield has much lower mine throwing speed, but throws 4 mines at once and has +2 maximum mines placed while Swift Assembly has much higher mine throwing speed with just a chance to throw multiple mines at once and does not have +2 maximum mines placed. I'd suggest using Swift Assembly on maps since couple of mines is more than enough for the most of mobs and using Minefield on bosses because you can reach maximum mines placed much faster. As far as I'm concerned Swift Assembly is good for Hadcore since you can move faster between laying mines, but I am a proud softcore pleb so I don't care.
Important note for PoB calculation - in PoB enabling minefield instead of swifts assembly results in losing about a half of dps. This isn't true but reason behind it is that PoB does calculate mine throwing speed but does not calculate that we reach mine cap much faster so this is actually a lie and for bosses minefield does provide more dps.

BiS Helmet for our build:

Shaper helmet with Hypothermia, +#% socketed spell critical strike chance and "Socketed Gems deal 30% more Damage while on Low Life" obtainable by crafting it with Essence of Hysteria and at least crafted +1 to Socketed AoE gems.
Helmet like this is unbeatable in terms of damage unless you go for elevating Hypothermia and Spell Crit chance mods which isn't worth it in my opinion.
Please note that Increased Area of Effect or Concentrated Effect do not increase our damage.
Enchantment - Berserk is the best option since "Hexblast deals 40% increased damage" doesn't give us that much compared to Berserk enchant.

Budget alternative will be in "Budget" section.

Absolute best chest for this build. Get yourself one with good corrupted implicits like #% increased maximum life, +1% to all maximum resistances or #% Increased damage if you can afford it but any Kaom's will do

Yep, cheap and one of the best defensive options available. It is the only source of "Damage of Enemies Hitting you is Unlucky while you are on Low Life" which helps a lot with survivability. Corrupted implicit "Bleeding cannot be inflicted on you" or "Cannot be poisoned" is not a necessity but it's very good and not that expensive, you can corrupt it yourself if it's expensive.


Rare ring with resistances, attributes and life and crafted -7 mana cost to non-channeling skills, crit multi is optional but benefitable. Unveiled life is actually very good because it provides mana regen which we actually do need but you can use other options for it. If possible - get Vermillion ring and use Fertile catalyst on it.

Please note that Mark of Submission doesn't work with mines or traps, but ring with curse of hit ring or gloves impicit does work.

Same as the ring, but here we also want +1 to All Skill Gems or +1 to All Chaos Gems. +1 to All Skill Gems is obviously better but not by much.
Annoints:
Skittering runes - for RMR and blasphemy AoE, very solid option and probably the best one if you don't have Unnatural Instinct.
Destructive Apparatus - if your RMR is fine without skittering runes this is the best DPS option (according to PoB)
Tenacity - solid option for both life and damage.

Just rare boots with movement speed, resistances and preferably as much life as possible. #% increased life recovery rate helps us with sustaining berserk but isn't necessary.

BiS, nothing more to add. Enables Berserk for us and we can get Elemental Weakness on Hit implicit.