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Best Support Gems for Herald of Ash

Damage supports ranked by their more/less multipliers · Path of Exile 2✓ Checked against game files · 0.5.5
Herald of Ash
#1Deadly Herald×1.3 all damage

51 support gems fit Herald of Ash in Path of Exile 2. 1 raise all of its damage or speed with a fixed multiplier; the biggest: Deadly Herald (×1.3, cost ×1). 5 more only multiply one kind of damage (physical, hits, area, ailments…), and 1 only work under a condition. Patch 0.5.5, from the game files.

1 supports that multiply all of Herald of Ash's damage

  1. #1
    Deadly Heraldrecommended by the game
    Supported Skills deal 30% more Damage
    ×1.3
    all damage
    cost ×1

5 supports for one kind of damage

These help only the part of Herald of Ash's damage they name: physical, hits, area, damage over time, or an ailment it has to inflict first.

  1. #1
    Concentrated Area
    Supported Skills deal 30% more Area Damage
    also: Supported Skills have 50% less Area of Effect
    ×1.3
    area damage
    cost ×1
  2. #2
    Swift Affliction I
    Supported Skills deal 30% more non-Ailment Damage over Time
    also: 20% less Duration of Supported Skills and Damaging Ailments they inflict
    ×1.3
    non-ailment damage over time
    cost ×1
  3. #3
    Swift Affliction II
    Supported Skills deal 30% more non-Ailment Damage over Time
    also: 10% less Duration of Supported Skills and Damaging Ailments they inflict
    ×1.3
    non-ailment damage over time
    cost ×1
  4. #4
    Brutality II
    Supported Skills deal 30% more Physical Damage
    ×1.3
    physical damage
    cost ×1.2
  5. #5
    Brutality III
    Supported Skills deal 30% more Physical Damage
    also: Hits with Supported Skills have 20% chance to ignore Enemy Physical Damage reduction
    ×1.3
    physical damage
    cost ×1.2

1 supports that need a condition

  1. #1
    Swift Affliction III
    only sometimes: Supported Skills deal 50% more non-Ailment damage over time if their duration is less than one second
    also: 30% less Duration of Supported Skills and Damaging Ailments they inflict
    ×1
    conditional
    cost ×1

Left out, outclassed by a higher tier of the same family (one per family per skill): Brutality I (by Brutality II).

How it is counted

Which supports fit Herald of Ash: the game's skill types with Path of Building's rules (the full list). Multiplier = product of the support's "X% more/less Damage" and "more/less Attack, Cast or Skill Speed" lines; a line limited to one kind of damage (physical, hits, poison magnitude…) is kept to that kind. Cost = the support's cost & reservation multiplier (GrantedEffectsPerLevel.CostMultiplier).

Assumptions

  • "% increased" lines, crit multipliers and utility (more projectiles, chains, area) are not multipliers here: their worth depends on your build.
  • A multiplier for physical damage only helps the physical part of Herald of Ash's damage, and so on for each kind.
  • Read the "also" lines: some supports add a cooldown or a cost in Glory or Combo.