I can recommend some early point distributions: you should try and max lightning and heal by lvl 20. Pick up firestorm and ice storm when you can. Put 1 point into the buffs as you unlock them. Then max firestorm. After that you'll prob want to decide if you want more damage abilities like drain life or some debuffs like weakness or nightmare. I recommend weakness as it helps you solo and just reduce damage in general.

Just know that the 2 biggest sources of damage are lightning and FS combo. Ice shard isn't really that good unless your looking for single target boss damage.. But even then I think that drain life is better since lightning and FS still do more damage per hit then ice shard, and the 12 sec CD isn't too bad once you realize you will lighting, weakness, IS+FS and heal in between cast of it.