I'm 100 conjuration, and around 90 destruction playing on expert difficulty. All of my clothing is enchanted to fortify magicka and reduce the cost of destruction spells. One would think me to be quite the dangerous opponent, however, I'm often two-shotted by standard enemies that can require 4-6 direct dual-casted fireballs to down. That may not seem so bad, since I can cast quite a few fireballs before needing a potion, but with no way to distance myself from a charging enemy (except for the occasional FUS RO DAH), I'm often unable to fend off an enemy with a two-hander in my face.
This is where my conjuration should come in, right? I shouldn't be taking those hits, since I have two dead thralls/dremora lords/atronachs at my disposal, right?
Wrong.
SEVERE pathing issues often leave my defenders stuck behind a pebble, or a twig, or some other invisible obstacle. This is mainly an issues in caves, or other tight quarters where they're forced to travel a linear path, but it happens often enough to make them seem nearly useless.
Very frustrating.
I know I could make my life easier by wearing heavy armor, and maybe even using a one-hander, but why not just go all the way and play a sword/shield warrior? I had NO issues as one on my first play-through.