I was thinking about a new arcane spell:
1m cooldown, channeled 1-4sec
Launches bolts of Arcane energy at the enemy target, causing X arcane damage. Consumes all charges.
Arcane Volley damage is increased by 50% per Arcane Charge, hits one additional target per Arcane Charge, and launches an additional bolt per Arcane Charge.
It would be like a channeled Arcane Barrage. Maybe it could replace Arcane Orb on Falling Stars talent, making Arcane Orb a core spell for arcane.