Gear: It's really simple and easy to gear this character, you just want Life/resist and rarity on every single piece. %inc fire damage is nice on rings, but it's a small boost and not needed. Also keep in mind, strength is always a good suffix because it provides life, you have a lot of free affixes on this build.
You're also going to stack both ward and life, to get the highest amount of ward you want to use Tier 1 bases of any hybrid base. You have a small choice on the body armour, you can either use
Runeforged Falconer's Jacket for 5% ms or 400 runic ward base with no MS.
Fox Idol is also important as it'll give you 5% quality, which is both a DPS and speed increase.
These can be any tier 1 hybrid bases, I just have armour/es above because they're generally the cheapest but any of them work (armour/evasion, armour/es and es/evasion).
If you need spirit you can also use
Soul Core of Azcapa in your crossbow.
Blackflame is another item you can go for, we bypass the downside and get a massive ignite magnitude. It's a good early pickup, but eventually you would want to replace it with a triple rarity gold ring. If you do use black flame, make sure you also use
Withering Presence.
Amulet:
Surefooted Sigil is the go to for speed, eventually you'll replace it with a +4 spells/5% quality rare. You can also use
Fireflower early on for damage.
Anoint:
Paragon is the best anoint, but might be expensive early on.
Burnout is a cheaper option if paragon is too expensive.