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Mechanics

This build uses Cyclone to summon and activate powerful minions. With Cyclone, you attack 6.16 times per second. Here's a list of things that happen as a result:
- Two Holy Relics trigger roughly every .62 seconds
- You gain and sustain virulence stacks (very easy to sustain 40) summoning the Agony Crawler
- Summon and sustain Sentinels of Purity (against uniques, but you can also get them from your poison kils sometimes)
- Gain 150 life and 14 mana on hit

Playstyle

The best way to get an idea for the build is to watch the videos above.
- Simply pop your non-life flasks and Cyclone through packs - your minions will do the rest!
- You can very easily face-tank high level bosses with this build (eg. I did a Minotaur at level 79 with under 5k hp facetanking).
- The only somewhat annoying map mod for the build is physical reflect as your relics will one-shot themselves. To run this mod, just summon one relic at a time before entering each new pack. The relic and your agony crawler will mop up just fine.

Skill Tree 

Ascendancy: Radiant Crusade-Unwavering Crusade-Bastion of Hope-Harmony of Purpose

Bandits: Kill all Bandits

Pantheon: Lunaris and Gruthkul for physical damage reduction

Passive Tree

Path of Building Link: https://pastebin.com/jyrr9PRT

Gems Setup

Gems are listed in priority order

6L Herald of Agony-Pierce-Minion Damage-Vicious Projectiles

This is the core 4L after which you have the following options based on preference.

• Summon Phantasm on Kill: great for additional clear power, you can swap this for minion damage for clear/bossing
• Damage on Full Life: huge damage
• Maim: decent damage and maim
• Empower: only really good if you have level 4 or a +1 socketed gems corruption
• Minion Speed: great for additional clear power, you can swap this for minion damage for clear/bossing
• Vile Toxins: good damage and option to swap for Pierce for bossing/clear

Herald of Purity-Minion Damage-Melee Physical Damage-Maim

Summon Holy Relic-Minion Damage-Controlled Destruction-Minion Life

These three setups are your main sources of damage. Feel free to customise your Herald of Agony setup to the content you're going and personal preference.

Cyclone-Fortify-Life Gain on Hit-Blind (assuming you have double "supported by" gloves)

If you want to use Cyclone before having the double "supported by" gloves, use Cyclone-Faster Attacks-Poison-Fortify/Life Gain on Hit. Additionally, you can get only a single "supported by" gloves and not use blind if you don't have the life gained on hit vs blinded enemies elder claw yet.

Cyclone is how we trigger our minions and sustain life and mana.

Immortal Call (1)-Cast when Damage Taken (1)-Enfeeble (5)

Some nice defensive layers.

Shield Charge-Faster Attacks-Blood Magic

Movement for when you're not Cycloning. Blood Magic is really nice as it means you'll always be able to attack and gain mana back (even in no-regen maps).

Hatred/Haste

Hatred = more hit damage, Haste = increased attacks = higher life gained on hit and minion attack speed - personal preference on this one (I like Hatred).

Flame Dash

Some nice movement utility you can throw into the 6th socket of a 5L Coming Calamity - not essential.

Gear

For a more detailed selection of gear, please refer to the PoB Link. The gear selected in the PoB is not mandatory if it is not stated. It is recommended that the player check the affix of the gear and make a better choice.

Move the mouse on the bold poe equipment to see needed mod

Overview

Elder Gemini Claw, Victario's Charity, Geofri's Legacy, The Coming Calamity, Dragonscale Gauntlets, Two-Toned Boots, Stygian Vise, Essence Worm, Ruby Ring, Turquoise Amulet, Crimson Jewel, Viridian Jewel, Viridian Jewel, Viridian Jewel, Seething Divine Life Flask of Staunching, Ample Quicksilver Flask of Adrenaline, Ample Silver Flask of Warding, Experimenter's Basalt Flask of Grounding, Experimenter's Quartz Flask of Heat

Higher budget considerations

Energy Shield on hit Watcher's Eye - Drop your Essence Worm aura for Discipline and get an extra 20% effective health gained on hit. This helps a lot for tankiness/survivability. This also works for Vitlity and LGoH Watcher's eye. Discipline is better though if you can afford the jewel.

Rare elder helm with +2/3 to socketed minion gems and supported by Minion Damage to socket Herald of Purity-Maim-Melee Physical Damage-Ruthless/Empower(level 3+) - This setup is useful against bosses who deal large area damage and kill your Holy Relics. Relics generally are good, but not stellar against bosses like Shaper and you often need to resummon them, so having only one (socketed in boots) and stronger Herald of Purity minions suits if you're going to be chaining t16+ bosses. Note, if you use Ruthless you'll want to drop Hatred for Haste or the Discipline + watcher's eye setup.

Leveling

Guardian Ascendancy priority: Radiant Crusade-Unwavering Crusade-Bastion of Hope-Harmony of Purpose.

The skill tree in this build suits itself well to leveling as almost anything. Simply come out of Templar's start along any track you wish, then travel up to Spiritual Command and Spiritual Aid. This will give you enough damage and attack speed to scale any skill.

No matter how you level, be sure to pick these up along the way to level them:

• Summon Holy Relic - Act 1 after Breaking Some Eggs
• Herald of Purity - Act 2 after Intruders in Black
• Herald of Agony - Act 3 Siosa or from a friend

Switching to the build is pretty flexible based on the gear you have available. Be sure to have the following at a minimum once you've switched (after the respec).

- Resolute Technique

- Spiritual Aid

- Spiritual Command

- Tireless

- Gravepact

- A claw with mana gained on hit implicit (Double/Twin/Gemini) and chance to poison and attack speed suffixes (master crafted attack speed is totally fine; don't need poison chance for final build, but it helps keep up virulence stacks before you have the jewels)