I was thinking keeping Gandalf as the commander would work great for the spell splitting property, but also using [[Stormsplitter]] to double dip more or less and just replace some of the red spells with lower cost instant casts. Again the card draw is still an issue but hopefully the suggested cards above help out!

Oh damn, I was under the impression that damage done by a commander abilities counted as commander damage. That definitely lowers the viability of this deck. Bummer!