Viscous Ball Build (Splatter)
Viscous
Punching an enemy deals
melee damage and applies 
slow. Enemies can Parry this attack.You and your allies have increased Air Control.Read more
Though this is a Splatter build getting items that help your 3 are very good early for poke. Buy left to right and then sell Spirit Strike and Melee Lifesteal when you start roaming at 10-15 mins (this is a Splatter build after all).
This is when youre going to swap from dmg and poke with your 3 and start building around your Splatter. Both Mystic Shot and Slowing Bullets are good for their spirit power and general weapon damage (you also have 2 empty weapon slots so why not). Get either Armor earlier if needed, Suppressor is optional.
This is when you will ideally have your 1 maxxed and will really want to beef it up with damage. Also grade your Superior Stamina or Armor here if you need/want, upgrade Suppressor into Mystic Slow if you bought it.
Pretty self explanatory, buy these if you can afford them in the very late game.
The order of leveling abilities
