Personally, for levels before 50, I had been using an admittedly unresearched, master-of-none build with:

1. Frost Nova
2. Hydra
3. Inferno
4. Arc Lash
5. Chain Lightning
6. Teleport

Enchantments:

1. Fireball
2. Blizzard, cuz why not

It was a ton of fun vacuuming up mobs, freezing them, and then using chain lightning to make them explode like little grenades right on top of each other, but it was admittedly VERY weak against single bosses.

After I finished the campaign, I switched to a much more min-maxed Ice Shards lucky hit build that's just been melting enemies like crazy:

1. Teleport
2. Frost Nova
3. Flame Shield
4. Deep Freeze
5. Frost Bolt
6. Ice Shards

Enchantments:

1. Fireball
2. Ice Shards

I don't have all the gear yet to avoid mana depletion and my barriers need work but its getting there.

Anyways, I just wanted to ask what you guys were doing with your Sorc builds to see what others have been enjoying :)