Idea: some spells, including champion specific spells, level up, or even improve in effect, as your level in the appropiate school improves.
So a Lvl 1 Chain lightning isn't that impressive, but Lvl 5 is nasty.
I do think "pew pew" is usually the best idea for magic, unless you have archer champions , then growth is best.
Haste is always important as well.
We really need some countercheese, to put in "yomi" on the magic side of things. (Derek/Jon would understand that one). Right now it feels like when it comes to magic, a degenerate strategy is pretty easy to find.