Damage Absorption? Yes!

Hi does stacking this absurd amount of damage absorption work additive up to 89%(While wearing the Stormfang Hood, which is useless in other regards for no chaos damage).
Would it be worth trying to put something together with this idea or just a fools errand.

Poorly done example to show the numbers on Maiven’s sphere of protection and Possesion

Side note is the % health restored per second from example Arctis buffed by increased health regen or increased healing?

Damage absorption stacks multiplicatively.

Increased Healing affects it if I’m not mistaken.

Thank you for explaining.
While wearing the stormfang hood isn’t worth it anymore I still think I’ll have a go at making a chaos character like this.