ES Chaos Witch

I decided to start a new char for Witch and max my energy shield to see what the fuss is about.

what do you recommend to make the most OP energy shield build?

Are there any good unique item combos?

*btw doing chaos build not necromancer, I might just get CI to be the Chaos god

I would need to spend at least 20% of my MAX passive points on energy shield just to get to CI