Here is the weapon you should get as a Swift Hunter.

Composite Longbow (STR +7) +1 (Cost: 200,895 gold)
Exit Wound (+3) (Fires through target, +4 AC for each target in front, +1d6 damage)
Splitting (+3) (Doubles the arrows, make separate attack rolls for each arrow)
Fiery (+1) (+1d6 fire damage)
Shocking (+1) (+1d6 electricity damage)
Cold (+1) (+1d6 cold damage)

I'll post more later on a build.