Unfortunately, it didn't take me long to find out
a. There is no spell similar to flames at higher level
b. I can't augment my armor using magic unless I'm wearing cloth, defeating the purpose of using heavy armor if I want to use mage armor
c. Trying to be close range and not putting all or most of my points into health is a recipe for a hard road
d. dual casting destruction spells is almost mandatory
The build I had in mind, however, was still ultra fun to play at low levels when it was more or less viable. Now, however, I find myself mainly standing back lobbing firebolts while Lydia tanks(and unfortunately she seems to deal most of the damage too

I'm now at level 20, with almost even distribution of points into life and Magicka. I've got one perk in block, one in restoration, 4 in destruction, One stealth, two heavy armor, and all the rest into smithing, alchemy, and enchant.
http://www.ign.com/builds/the-elder-scrolls-5-skyrim?d=000000000000000000000000000000000000000000000011000001000010100000000000000000000020000100010000010001000100010000000000000000000000000000000000003100010000000001
After some learning, and seeing how just about any build other than the one I'm trying is likely to be considerably more powerful, I'm tempted to start over to try either a melee or stealth build out, but I'm also thinking of maybe moving in a slightly different direction with the character I have now, such as adding either conjuring or illusion. Not that I'm all about what will be the most powerful, I'm looking for the most enjoyable experience.
With that in mind, What builds has everyone played and which did you have the most fun with?