Lightning splash from storm calling.
Impulse from destruction staff.
http://esohead.com/calculator/skills#cMkz9MAIPl8hMZI85ae7CmaqS8K7GmzuI847zzxLCe
Really doesn't matter whether you put your attributes into health or magicka. If you don't put attributes into magicka, you will need to use light armour as you say, and probably also use a few enchants/traits and/or mundus stone.