Core requirements
The advanced setup is A, and the budget setup is B.
- Required weapon
- A·B Demon Machine
- Pierce
- 66 + 33 = 99%
- Attack speed
- Shael 20% · 11 frames
- Cast rate
- A·B 70% ≥ 63%
Attributes
Total attributes with equipment · hard points shown separately
| Strength | A·B 80Hard points A 40 / B 70 |
|---|---|
| Dexterity | A·B 95Hard points A 5 / B 40 |
| Vitality | 100 hard pointsA·B Shared |
| Energy | A 315 / B 250 hard points Remainder after equipment requirements and Vitality |
Attribute calculations and equipment changes
Strength
Unupgraded Demon Machine requires 80 Strength. A uses base 10 + Torch 15 + Annihilus 15 + 40 allocated; B uses base 10 + 70 allocated. Do not replace the helm or boots with high-requirement pieces.
Dexterity
A has base 25 + Torch/Annihilus 30 + Razortail 15 + Raven Frost 20 + 5 allocated = 95. B assumes 15 Dexterity on Raven Frost and allocates 40. Adjust for the actual ring roll.
Vitality
This baseline mixes Vitality and Energy without assuming a completed 95% Energy Shield. Retain Vitality for poison and mana depletion.
Energy
From 460 total points at level 90, A subtract 40 Strength, 5 Dexterity and 100 Vitality; B subtract 70 Strength, 40 Dexterity and 100 Vitality, then invest the remainder in Energy.
Skills
Level 90 · 101 hard points
Main skills and synergies
Prerequisite · support 1 point each
Includes 12 quest points; equipment skill bonuses are excluded. Unlisted skills have 0 points. A and B use the same allocation.
Investment order
Early on, use 
Fire Ball to progress and prepare Demon Machine for level 49. On switching, complete 
Enchant·
Warmth·
Fire Mastery first.
When using Energy Shield, secure 
Telekinesis 20 first; at level 90, complete Energy Shield 13 and 8 prerequisite/utility points.
At levels 91–97, raise Energy Shield to 20; at 98–99, raise 
Frozen Armor 3 . If Energy Shield with equipment exceeds 40, reallocate extra points to other defensive skills.
Equipment skill bonuses and allocation notes
The current baseline is a defensive hybrid with Telekinesis 20 and Energy Shield 13. 95% absorption applies only when Energy Shield actually reaches level 40 with equipment.
A·B Shared · Level 90, 101 points
Open this allocation in the simulator ↗
Equipment
A / B: compare modifiers and replacement requirements.
| Slot | Advanced A | Budget B | Conditions |
|---|---|---|---|
| Weapon | A Demon Machine | BDemon Machine | Required for both setups |
Weapon choice and replacement detailsA · Setup requirementsUnupgraded Chu-Ko-Nu Shael rune · explosive bolts · 66% pierce B · Setup requirementsUnupgraded Chu-Ko-Nu Shael rune · explosive bolts · 66% pierce Selection rationale and replacementsShael's 20% crosses the unupgraded Chu-Ko-Nu's 8% IAS threshold for 11-frame ordinary shots. Upgrading is not required for this fire build. | |||
| Shield | AEmpty hand | BEmpty hand | No shield |
Shield choice and replacement detailsSelection rationale and replacementsA Sorceress cannot equip Demon Machine together with a shield. | |||
| Helm | A Runeword Flickering Flame | BRuneword Lore | A prioritizes resistance reduction |
Helm choice and replacement detailsA · Setup requirementsLight 3-socket helm +3 Fire Skills · enemy fire resistance reduction B · Setup requirementsLight 2-socket helm +1 skills · lightning resistance Selection rationale and replacementsA has a Resist Fire aura that can help offset the Sunder Charm penalty, but check the actual resistance panel. | |||
| Armor | A Skin of the Vipermagi | BSkin of the Vipermagi | Shared |
Armor choice and replacement detailsA · Setup requirements30% Faster Cast Rate · all resistances B · Setup requirements30% Faster Cast Rate · all resistances Selection rationale and replacementsMaintain both FCR and resistances on the armor. | |||
| Gloves | A Magefist | BMagefist | Shared |
Glove choice and replacement detailsA · Setup requirements20% FCR · +1 Fire Skills B · Setup requirements20% FCR · +1 Fire Skills Selection rationale and replacementsFCR is for Teleport. Bolt firing speed is determined by Shael and weapon speed. | |||
| Belt | A Razortail | BRazortail | Maintain the 99% Pierce setup |
Belt choice and replacement detailsA · Setup requirements33% Pierce · 15 Dexterity B · Setup requirements33% Pierce · 15 Dexterity Selection rationale and replacementscombines with the weapon's 66% for 99%. This is not 99% more damage or a guarantee that every shot pierces. | |||
| Boots | A Silkweave | BFaster Run/Walk and resistance boots | Survival and mana before IAS |
Boot choice and replacement detailsA · Setup requirementsMaximum mana · mana after each kill Selection rationale and replacementsChu-Ko-Nu physical damage is low, so do not rely solely on mana steal to sustain mana. | |||
| Amulet | A Sorceress FCR amulet | B Sorceress FCR amulet | 10% Faster Cast Rate required |
Amulet choice and replacement detailsSelection rationale and replacementsArmor 30 + gloves 20 + amulet 10 + ring 10 = 70%, reaching the 63% FCR, 9-frame Teleport breakpoint. | |||
| Ring 1 | A Raven Frost | BRaven Frost | Maintain attack speed |
Ring 1: choice and replacement detailsA · Setup requirementsCannot Be Frozen · target 20 Dexterity B · Setup requirementsCannot Be Frozen · at least 15 Dexterity Selection rationale and replacementsNeeded because chilling slows shots. Include the Dexterity roll in stat calculations. | |||
| Ring 2 | ACast rate/mana/resistance ring | BCast rate/mana/resistance ring | Shared requirements |
Ring 2: choice and replacement detailsSelection rationale and replacementsRemoving 10% reduces total FCR to 60%, falling below the 63% breakpoint. | |||
Mercenary and weapon swap
| Slot | Advanced A | Budget B | Conditions |
|---|---|---|---|
| Mercenary | A Act 2 Prayer  Runeword Infinity Runeword Fortitude Andariel's Visage | B Act 2 Prayer Runeword InsightRuneword Treachery Tal Rasha's Horadric Crest | A Conviction / B Meditation |
Mercenary detailsOperating requirementsEnchant the mercenary as well. Infinity's Conviction lowers fire resistance, but the weapon's lightning resistance reduction does not affect your character's fire damage. | |||
| Weapon swap | A +3 Enchant  Runeword Leaf for prebuffing, then Runeword Memory for Energy Shield | B +3 Enchant Runeword Leaf or a +skills staff | Separate prebuff and attack weapons |
Swap detailsOperating requirementsLeaf boosts Enchant through +3 on the base and +3 Fire Skills. Memory is for Energy Shield; do not count both auxiliary weapons as equipped simultaneously. A must also check its current Energy Shield level rather than assuming 95%. | |||
Upgrade order
- Secure Demon Machine, Shael and Razortail first.
- Add Raven Frost and complete 70% FCR, poison resistance and mana.
- Add Flickering Flame and a fire Sunder Charm together with resistance support.
- Raise damage with an Infinity mercenary, Enchant prebuff equipment and Fire skill charms.
Playstyle
- Buffs
With +Enchant equipment, cast Enchant on yourself and the mercenary.
Buff details
Details
Also cast Energy Shield and armor, then always return to Demon Machine before firing.
- Fighting packs
Fire bolts through lines of overlapping enemies.
Fighting packs: details
Details
A bolt that pierces the front enemy can explode again behind it, becoming more effective against dense packs.
- Maintain distance
Use ordinary shots to attack and Teleport to realign your firing path.
Distance-management details
Details
Teleport casting and crossbow attacks use different speed systems.
- Bosses
After Static Field, keep firing while staying within the mercenary's Conviction coverage.
Bosses: details
Details
With only one enemy, piercing repeat explosions offer less benefit.
- Survival
Maintain Cannot Be Frozen, poison resistance and mana potions.
Survival details
Details
Retreat if Energy Shield expires or mana runs out. The current A/B is not a 95% invulnerable setup.
- Budget progression
B starts in the Hell Stony Tomb and Mausoleum, skipping fire-immune uniques.
Budget progression: details
Details
Prioritize the Stony Tomb and Mausoleum, where ordinary monsters lack fire immunity, and inspect unique modifiers. Avoid the Chaos Sanctuary's fire-immune Venom Lords in B at first. Upgrade the helm and mercenary while retaining the required crossbow and Razortail.
Mechanics and notes
Enchant and explosions
Demon Machine's explosive bolts deliver Enchant fire damage to an area. Pierce creates later explosions; this is distinct from raising physical weapon damage.
Ranged Fire Mastery application
Since 2.6, Fire Mastery correctly applies to Enchant's added fire damage on ranged weapons. Do not use outdated ranged-damage explanations.
IAS, FCR and chance to hit
Shael supplies IAS for bolts; FCR on gloves and armor supports movement. Enchant's attack rating and Raven Frost help direct hits, but 99% pierce does not mean 99% chance to hit.
Strengths, limitations and farming style
Strengths
Its essential, build-defining equipment is clearly identified.
Piercing explosions quickly clear dense packs.
Limitations
Without a shield, resistances and stats need separate support.
Requires managing prebuffs, Energy Shield and mana.
Additional variants
Wisdom pierce variant
Wisdom's 33% pierce can replace Razortail. This loses Flickering Flame's Fire Skills and enemy resistance reduction, so distinguish it from the baseline A and recalculate the belt and Dexterity.
Vitality variant
Reduce Telekinesis from 20 to 1 and Energy Shield from 13 to 0, freeing 32 points. Put 1 each into Ice Bolt, Frost Nova, Ice Blast, Glacial Spike and Blizzard, plus 20 into Frozen Orb and 7 into Cold Mastery, for an Orb hybrid totaling 101 points. Move allocated Energy into Vitality and keep this separate from the baseline Energy Shield tree.