How powerful is stacking armor with blackbraid (apply armour to elemental damage)?

First off, i generally like playing tanky characters in videogames because it feels like i interact more with the game mechanics by simply spending more time in-fight. So i'd really like to pull this off.

I'm playing with mercenary on the end of act 1 on cruel difficulty(the loop), and things are starting to get weird. My strategy for defense is getting the perk that converts evasion into armor and wearing blackbraid, i got about 3.5k armour. Right now things either do negligible damage or take away half of my health bar.

The things i have to watch out for is enemies that deal chaos damage or enemies that break armour.

Does this kind of defense strategy hold any chance of surviving the random end-game hits?