After casting Hailstorm once, you’ll spam Prismatic Bolt to wipe your foes. To be honest, you even won’t use Hailstorm for AoE, you’ll just cast Hailstorm for the crowd control it causes stuning and freezing, and for the eletrical damage bonus the hailstorm tier has.
Thunder Locus and Frost Wave are really good AoE, but in this build I choosed Hailstorm. Also, with the recommended pet spells you’ll have a small army for yourself and Ice Prison + Hailstorm + Frozen Fate does a great crowd control. I’ve read some reports saying that Astral Ally isn’t worth, so it was dropped. But I won’t deny that the bonuses it has are great.
Torchlight 2 Elite Prismatic Bolt Embermage Guide (Wand + Shield) by ImadaĮlemental Boon has a short duration and long cooldown, so it was dropped.