Base idea behind the build was to use a bow to stack a bunch of levels to a gem and while looking through unique quivers I came across The Shattered Divinity, which gives a bunch of nice stats for projectiles through the Greater Harbinger of Directions. After looking through all the projectile spell gems, fireball came across as the best way to utilize the added hits and the end result shotguns packs quite well. First I wanted to use a trap support with sunblast for casting, but learned that sunblast won't aim projectiles, so I went with mines instead.

PoB: https://pobb.in/TmPi7p2ayHlv

Poe.ninja: https://poe.ninja/builds/pl54150/character/0li0-2966/JousiTuliPalloilija