I like how "clunky" melee becomes after installing Precision. It really helps to appreciate higher reach of two-handed weapons although it hinders spell casting. Despite this the necromancer leader kicked my ass hard with her paralyzing staff during the contraband quest, throwing me around and insta freezing my ass off.
It's a blind questions considering I'm playing with mods but sometimes enemies catch black mist around them when they attack me in melee and suffer some damage. I don't have the ebony mail, which is the common answer on google. I don't know whether it's Mysticism's bug, Blade & Blunt's one or something else completely. I don' have any buffs\effects\enchantments that can cause this. I just cast the stone flesh spell sometimes. Maybe it's a quest item?