Arcanist - The Pure Caster: High Damage, the Thinnest Base Durability

What It Does Well

Officially described as those who treat magic as a science to be unraveled - warping aetherial and elemental energy into demonstrations of power that rival small armies, while such raw force leaves little in terms of defense.

• ▸Damage: every attack skill hits hard enough for a caster - though the high-tier ones take a long time and a lot of skill points to reach.
• ▸Self-contained scaling: Spirit (which boosts elemental damage), the Offensive Ability that criticals need, and critical damage multipliers are all raised by the mastery itself.
• ▸Area damage: two each of piercing, falling, and nova-type skills give wide area coverage.
• ▸Energy: high Spirit plus permanent buffs and passives supply energy generously.
• ▸Utility: the only buff/debuff removal in the game, letting it react to strong debuffs such as the Sunder added in v1.2, alongside its emergency evade.
• ▸Exclusive skill: one that reduces cooldowns across all skills.
• ▸Attribute growth: Physique 1 / Cunning 2 / Spirit 4.

Strengths and Weaknesses

• ▸Strength: percentage passives plus flat bonuses from a permanent buff line secure high Offensive Ability.
• ▸Strength: a permanent buff tree that raises defense against both damage and status effects, and a genuinely convenient emergency evade.
• ▸Weakness: few attack skills carry a weapon-damage component, so debuff-on-hit effects and attack damage converted to health are hard to use.
• ▸Weakness: the lowest Physique of any mastery and no health or Physique skills, hence low health.
• ▸Weakness: little self-sourced resistance reduction - only the effect attached to freeze and Distortion.
• ▸Weakness: no way to reduce enemy Offensive or Defensive Ability.
• ▸This list follows the Japanese wiki's Arcanist page and can change with patches.

Choosing a Partner and Getting Started

Arcanist's two holes are durability and resistance reduction. The early-game impression of "lots of damage, dies instantly" is exactly as designed, and it resolves as skill points and gear accumulate.

• ▸Soldier: armor, health, and shield block directly cover the lowest-Physique problem.
• ▸Inquisitor (AoM): shares elemental damage while supplying both the resistance reduction Arcanist lacks and instant healing plus defensive skills.
• ▸Demolitionist: shares fire and lightning and brings category B resistance reduction plus crowd control.
• ▸Fill resistances from gear and components first - see the Resistance Fix Lookup article for what is short and by how much.
• ▸Skill allocation can be respecced at the Spirit Guide at any time (see the Respec article).

1. Official Grim Dawn Game Guide: Masteries — Confirms the official description of Arcanists treating magic as a science, warping aetherial and elemental energy into army-rivaling power while lacking defensive capabilities.
2. Grim Dawn Japanese Wiki: Arcanist — Confirms the elemental and aether pure-caster identity; self-scaling of Spirit, Offensive Ability, and critical damage; the lowest Physique of any mastery with no health-scaling skills; the percentage damage reduction buff, emergency evade, and timed invulnerability; the game's only buff/debuff removal; the ability to react to v1.2's Sunder; that self-sourced resistance reduction is limited to the freeze effect and Distortion; and the listed strengths and weaknesses.
3. Grim Dawn Japanese Wiki: Masteries index — Confirms the attribute growth (Physique 1 / Cunning 2 / Spirit 4), favored damage types (1. elemental, 2. aether, 3. chaos), and the archetypal-mage positioning.
4. Official Crate Forum: Grim Dawn Version v1.3.0.4 + Hotfixes — Official patch notes for the verified version.