Laning This is what the laning build will be, Close Quarters for damage High-Velocity is generally good for your projectile and this will be used for upgrade. Green items for surviving
CORE These core items enables you to at least 1v3. Get into the enemies face start autoing their heads. Cold front greatly helps placing your shots. Prioritize aiming for their softies to make fight easier.
Early mid game These are all important. Get them in this order. When you get Mystic Reverb start looking for easy kills, it will massively boost your damage.