Huntress is low health, so she will need a few mobility items. Defensive items for sprinting like Rose Buckler and Cautious Slug are really useful if she has mobility.
Soldier's Syringe will be Huntress's main item in this build. You can stack as many of these as you want, and it will be OP.
Both Lens Maker's Glasses and Harvester's Scythe builds up her critical hit chance and increases her overall damage. Harvester's Scythe(or Leeching Seed) also gives Huntress the ability of healing herself.
Predatory Instinct allows Huntress to build even more attack speed. Whenever she get a critical hit, her attack speed increases. This item is made for Huntress in this build.
This item can combo with Ukulele(which every member of your team should have one). Every time you get 3 kills, you enter a frenzy which increases your attack speed and your movement speed. This item is also perfect for her.
These items increases her overall damage and AoE damage, they are pretty much the base damage.
This entire build is centered around Huntress's Laser Glaive, so lots of Backup Magazines are required for this to work.
This is one item that gives her lots of AoE damage. Killing an enemy would light all enemies around on fire. Really good item for this build.
Similar to Gasoline, this item stacks her AoE damage.
These items stacks her proc damage, makes her wipe everything faster.
This item is made for Huntress, using this will allow you to donate Syringes and Crit Stacking items to other teammates.
This item allows her to maximize her AoE damage. While the enemies get sucked together, she can just use one Glaive and instantly wipe them all.