1 point in static and warmth
20 points in frozen orb
8 in cold mastery
20 in meteor,fireball and fire mastery each.
Pick up every orb you find on the ground until you find one with energy shield or one of the cold armors. Put it on weapon switch and use it to cast ES or the cold shield.
The benefit of this character over a pure fire,ice or lightning sorc is that she can kill anywhere in hell difficulty without running into immunity problems. Her attacks ont be as powerfull as a pure fire or ice sorc but her versatility is more important,I think. This character is completed at level 90 but is viable long before that.
Once you start finding the good equipment this character is easily the best in the game,imo. A meteor/orb sorc with max resists,50% damage reduction,75% block and a well equipped nightmare defensive merc is one hell of a beast. She can fight anywhere solo and clear areas quickly. In my MAGIC FIND gear she dishes out 12,000 plus meteor damage,5,000 plus fireball damage and 400 frozen orb damage(per shard). Meteor has a casting delay but the afterburn damage stacks. Frozen Orb hits monsters all over the screen and fireball is spammable. That's 3 skills all useful in hell difficulty.