Occultist(malediction and frigid wake) + petrified blood + mom + eldritch battery + fortify = ???

Hi folks,

so atm I´m PoBi´ing an Occultist and was thinking how good the defense layers in the title would work together.

Malediction and Frigid Wake: 20% reduced Damage from hits

Petrified Blood: 40% prevented (ofc there is the dot)

Mom + Eldritch battery: 30% of dmg is taken from energy shield

Fortify: 20% less dmg taken from hits

On paper that sounds pretty good, but in reality I have no idea how this works all together. Can anybody help with the math??

Thx for your time mates!https://pastebin.com/ibhqZBE8

this is the POB so far, if u want to have a look