Where are the locations of all these at? I found the Wrathman one next to the Reaper's Lair, but I can't find the other 2.

Also the Wrathman is really tough! He can take a bit more damage than my dremora lord, and I commanded Serana and my dremora lord to attack him, and he got the dremora lord within 1 hit of dieing. Also remember he was getting attacked by the Dremora AND Serana at the same time.

Also, anyone know if the undead conjuration perks work? I have all the perks on the left side, and the Wrathmans duration is 60 seconds. The one perk says it doubles the summon duration of "reanimated corpses", but I thought it might apply to undead in general.

It might be my level but it took three fireball spells to take a Wrathman down for me. I was like level 23.

They are stronger depending on their soul gem. Some have lesser other have grand.

Are you talking about the summoned ones? I know there are different leveled enemy ones, but the summon spell is expert level, costs a bit less than Dremora Lord summon.

I haven't found any of the books, where are they? also what is the best spell to use on the stones with the blow glowing orb?

I have the mistman summon and it lasts 120 secs for me with the necromancy perk.