My Build

Might swap Chain for pierce on lightning arrow, depending on how it feels.
Or swap in scattershot over chain, when not doing bosses.

Herald of thunder for early/mid campaign, eventually replace
Use precision if you do need accuracy

Feel free to use wind dancer in campaign as well.

Potentially have a crossbow swap with your weapon passives picking up grenade nodes for cluster grenades/rapid shot.

Another potential setup is snipe/snipers mark

Magnetic salvo is worth trying as well.

Can also swap lightning arrow for shockchain(late campaign)

Enfeeble or conductivity on cast on shock setup

!!other potential supports!! Execute/inspiration/maim/cull

!!Maps aura setup!!
Wind dancer/cast on shock/ghost dance(only when you have some ES)