I have tried a few mage builds but always found them weak for destruction, and OP and cheap with illusion and conjuration.

This time I will limit myself to necromancy - no atronachs and ESPECIALLY no Dremora Lords.

Anyway, with this build will I be able to get say, a 50% reduction in destro?
http://skyrimcalculator.com/#135554

I will probably raise magic to health 2 to 1. Thoughts?