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
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.
For your late game Headhunter + Burst Fire + Glass Cannon would destroy whoever you are targeting Siphon Bullets + Leech + healing booster for sustain Knockdown so you can place your shots much easier Crippling for Thanos Snap