I read some dude brought Savos Aren back and that he summons two storm thralls, if thats true it seems pretty intense.

Spoilers

Ulfric would be cool, so would Skojr, Kodlak or Mercer. Just seeing any of those characters fight as an undead thrall would be awesome.

Nazeem. Just to be vindictive. Oh, and Farengar. Same reason.

Power-wise...? The guy at the end of the Peryite quest.

EDIT: Savos Aren apparently despawns at a certain part of the College of Winterhold quests. Not sure since I havent seen it myself but yeah, heard complaints about it.

If you highlight the text you entered and go up to the box that says "other styles" in the full editor you can make your text contain a spoiler tag Frank.

I did bring Savos Aren back. He normally doesn't summon Storm Atronachs (unless he is low on magicka) normally the guy actually summons Dremora Lords

That'd be sweet to bring him back, though I haven't reached that point yet in the College on my latest character. On my last one, the Dead Thrall spell was bugged out. Permanently said I had two of them summoned and nobody wanted to be around me. Even if I made new Thralls and killed them, totally ruined that spell for me so I stopped using it.

First one being the coolest imo

Yeah, Savos Aren was summoning dremora lords for me as well.

I thought the Caller would dual summon as well, since she did against me when I fought her. Turns out she didn't. She also ran around rocking monsters with ice spells, but when she fought me she was just using lightning. I was rather confused.

Savos Aren would be sick to bring back! I'd probably have him and a Lightning Thrall out at all times... now I just gotta keep playing my mage so I can do that