0.4 Poisonburst Pathfinder Leveling Guide

In act 1 it's very important to have gear with flat physical damage to attacks. At lvl 11 you want to get a Warden Bow, with %phys or flat phys. Any flat ele rune is okay, wont increase your poison dmg but it can add a little bit of boss dmg as you spam Poisonburst Arrow

Also look at the vendor in town every 1-2 lvls for flat damage gloves, every flat for the build is massive in act 1

While flat elemental damage isn't ideal, it's still quite good for lvling because Toxic Growth does do a lot of hit dmg before you acquire all of your poison nodes.

Movement speed on boots is also extremely good if you can find them, try to search the vendor every 1-2 lvls. I would never swap out movement speed boots, only replace them with other boots that have movement speed.

Besides that you're just looking for life/resist on gear, but flat damage is the most important on gloves/rings.

!!!!Important!!!!!
Always salvage weapons with quality for whetstones and always salvage items with sockets for artificers orb, this is extremely important for gear upgrades throughout the campaign.

I also personally prefer to vendor all rares for gold to gamble in act 2 and act 3 for better gear.