This build focuses more on an all around approach, while focusing on tanky Vyper. I have tried Pure bullet and Pure Spirit (built around 2), and both do not feel good late game. This build makes you rival tanks and gives you great damage on both bullet and spirit.
Rushing your 3 max level will allow you more sustain and survive early. You only need two purple items to have close to 600 damage on your 2. Which is really strong.