In act 1 it's very important to have gear with flat damage to attack, this can be any element or phys. Ideally at lvl 11 you want to get a warden bow with 1 socket, place a desert, glacier or storm rune in here for a big boost in DPS.
Movement speed on boots is also extremely good if you can find them, try to search the vendor every 1-2 lvls.
Besides that you're just looking for life/resist on gear, but flat damage is the most important. Try to also grab a low level shield and eventually a low lvl mace, so you can Shield charge later on and eventually leap slam(this is optional but will make your campaign run faster).
Make sure to have a shield in your weapon swap to shield charge(this is optional).
!!!!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.