Originally posted by UCanShootMyNova
Given Sidious's lightning is capable of disintegrating at the very least ( heck Starkiller's is capable of that and much much more and Sidious is more powerful ) it's the only logical solution.
Force augmented defenses, obviously. It wasn't just the armor.
We know that Vader was mortally injured by the Lightning, so it wasn't Barrier. Everything we know suggests that Vader willed his way through the Lightning.