Skill Gems
Gems are a fundamental part of your build. Getting the correct link setups before entering Maps and leveling those Gems as you progress through the Atlas is one of your main goals. This is how your Gem Setup should look like before entering Maps:
Poisonous Concoction
Poisonous Concoction is our main damage dealer. Add Greater Volley Support and Greater Multiple Projectiles Support to throw more flasks at once. These flasks can overlap on targets to deal greater single-target damage.
After that, add Unbound Ailments Support for a longer Poison Duration. Once you have more than 4 Links to work with, add both Void Manipulation Support and Vicious Projectiles Support to deal more damage!
Once you have a higher budget, upgrade these Support Gems to their awakened versions, which are: Awakened Vicious Projectiles Support, Awakened Void Manipulation Support, Awakened Unbound Ailments Support and Awakened Greater Multiple Projectiles Support.
Plague Bearer
Plague Bearer serves as an extra clear speed tool. Since it already scales off of your abilities damage, you can't support it with anything that gives it "more damage". All you can do is improve it's level with Empower Support or it's area with Increased Area of Effect Support.
Wither Totem
Wither applies an incredibly strong, stacking debuff to an enemy, which can almost double your damage. This is your bread and butter in boss fights and needs to be up at all times against them.
You achieve this by putting the Wither spell on a Totem via Spell Totem Support. You then use Multiple Totems Support to summon up to 3 totems instead of 1. The finishing touch is the Faster Casting Support which lets the totems apply the Wither Stacks faster!
Shield Charge
Shield Charge is your main Movement Skill. It scales off of your Attack and Movement Speed, so keep a good balance of those and you can rush through maps in no time! The Faster Attacks Support is there to help out with the Attack Speed part.
Auras
These do not have to be linked or even in the same item, they are just grouped to have an easier overview!
You use Determination and Grace as your main defensive auras. They provide you with Armour and Evasion, giving you formidable defensive layers.
The rest of your Mana Reservation goes towards Defiance Banner, which compliments your other 2 Auras.
Other Utility Gems
These do not have to be linked or even in the same item, they are just grouped to have an easier overview!
Molten Shell provides you a huge defensive shield that scales with the amount of Armour you have. It's an instant skill, so you can simply put it on your left-mouse (walk) and it activates whenever it's cooldown is up.
Blood Rage gives you extra Attack Speed and Frenzy Charges on kill. It applies a small Life Degeneration to yourself as a payoff, which is easy to handle with your Life Leech and Life Flasks.
Ancestral Protector serves as a small boost to your single target damage. While you are near the Totem, you gain a higher multiplier to your attack speed.
Withering Step grants you the Elusive Buff, which increases your Movement Speed and gives you a chance to avoid enemy hits. Whenever an enemy comes near us while we have this Buff up, it automatically gains an amount of Wither Stacks. This is helpful while mapping, since we won't summon our Wither-Totem all the time.
Skill Tree Progression
Cluster Jewel Setup
Cluster Jewels are items you can insert into the outer Jewel Sockets of your Passive Tree. They extend the Passive Tree with extra Nodes, giving you extra customization options for your build!
For this build specifically, you want a 8 Passive (9 for budget) Large Cluster Jewel with % increased Chaos Damage. On top of that, you want 2x 4/5 Passive Medium Cluster Jewel, with % Damage over Time.
For more information on what Cluster Jewels to get, check out the Milestones down below!