Pyroclast Mine is one of best single target skill in game. This PoE 3.10 Pyroclast Mine Saboteur Build is free in gear selection and there are no mandatory items. So it is very friendly to league starter.

Quick Jump

Skill Tree

Ascendancy: Bomb Specialist -> Demolitions Specialist. Pyromaniac in third and Born in the Shadows to finish. Explosives Expert is a decent alternative as the last node too if you prefer more AoE & damages.

Pantheon: Probably Soul of Lunaris as i always do for the major one, and Soul of Ryslatha as minor power. Honestly, it's your own choice there.

Bandit: Kill all for versatility, otherwise Alira is a fine choice too.

Passive Tree & PoB

Path of Building Link: https://pastebin.com/kXJBL3Hw


 

 

 

 

Gems Setup

Dex. required : 98 (93 from tree, 5 req.), str. required : 155 (74 from tree, 81 req.).

Main setup (6l, BGBBGR) : Pyroclast Mine + Swift Assembly + Combustion + Immolate + Trap and Mine Damage + Empower OR Fire Penetration. Swift Assembly procs only once with Minefield, not worth it combined, so we dropped Minefield. Swift Assembly = ~60% "more" damages on average.

Auras (2s, B(B/R/G)) : Summon Skitterbots, Herald of Ash. Ideally Zealotry here but you'll need a decent mana pool. So we use a 25% reservation skill instead. You could also use Flesh and Stone in sand stance, Arctic Armour, etc.

CwDT setup (3/4l, RRBR) : Cast when Damage Taken (lvl 14) + Steelskin (lvl 18) + Enfeeble (lvl 17) + Summon Stone/Flame Golem (lvl 16). A decent defensive setup.

Travel skill (2/3l, BBB) : Flame Dash + Arcane Surge (lvl 5/6) + Faster Casting. Faster Casting isn't really necessary here.

Utility / Buffs :

Decoy Totem (R) : Always there to tank a bit for us.

Bear Trap (G) : Free 15% increased damages taken by enemies, on bosses for instance, if you have some time to throw one.

Withering Step (G, Travel skill) : Can be useful in place of Flame Dash sometimes.

Smoke Mine (G, Travel skill) : Can be a good travel skill if you get used to it.

Potential fortify setup (3l, (R/G)GR) : Whirling Blades (Daggers) / Shield Charge (shield) / Leap slam (staff) + Faster Attacks + Fortify. I'm clearly not sure about it. Especially since i'd ideally use a staff as 6l and try to get a Kaom's Heart somehow (in SSF, i'll just pray).

 

Gear Setup

As always, priority is to get some life and resistances, and 25/30% movement speed on the boots. When you'll start mapping 135% all elem resists is mandatory and i'd recommend to have 169% asap so you'll be capped even with an Elemental Weakness curse on you from a map mod or else. In your hideout since the -60% are taken into account now you want 109% (75% + the 34% Elemental Weakness removes in high tier maps).

For this build, there's nothing mandatory. You'll need some strength on your stuff, and a bit of dexterity.

For the flasks, you definitely want a Diamond Flask (w/ anti curses, of Warding), the rest is related to preferences. I usually always roll them to get lasting immunity to freeze / bleed and curses.
I'll probably go for a Quicksilver (w/ anti bleed, of Staunching), a Stibnite (w/ anti freeze, of Heat) for the blind, a Panicked Divine Life Flask and either a Mana Flask or Hybrid Flask as the last one.

This build works well with trash tier stuff (cf. PoB link), but can be improved by a lot with proper stuff :

Weapon : Martyr of Innocence (unique), Tremor Rod (unique), ...

Body armour : Belly of the Beast (unique) for decent life, Kaom's Heart (unique) for even more life. Carcass Jack (unique) eventually for more AoE.

Gloves : The new Blight unique gloves (Machina Mitts) enabling us to leech from the mines. Vaaled ones with "Curse enemies with Enfeeble on hit" as the implicit, saves 1 gem slot. Otherwise some good Fingerless Silk Gloves (loot locations).

Rings : 2 proper Opal Rings.

If you're a new player, you may not know Tabula Rasa is great to get your first 6l, and it's easily achievable through a bit of farming in the Blood Aqueduct (Act 9) to get a full set of the "Humility" divination card.

For the leveling, Stormblast Mine is a level 1 gem, so you should be fine with it until you get Pyroclast Mine at lvl 28. We take almost no damage specific nodes in the skill tree, only Snowforged and the nodes towards it (so 3 total).

 

For a more detailed selection of gear, please refer to the PoB Link.