*** Disclaimer *** this build is not mine - credit must go to 'Kristofer ESO' (check out and sub to his youtube channel if you like the build! I have put the build here for my quick reference.

Lightning staff - Use Sharpened for spell pen
Use Spinners 5 piece for even more pen! (light armour for more pen bonus)
Find even more pen in the CP's!

Use Clockwork citrus fillet food - health and magika increase and regen bonus
(cheaper option is witchmothers potent brew)

Also use Slimcraw (2) set for minor beserk. And Amber plasm (5) for insane revovery! - weapons are hard to get so maybe spinners here and Amber on gear. Use protective on jewelry or stam sustain in no cp.