Really, the Armored Trolls have nothing on the gargoyles.
If your Troll dies, you have to go aaaaaallllllllll the way back to Dawnguard to get another one.
If my two Gargoyles die (Amulet of the Gargoyle, 2 G's for the price of one...

), I just summon two more in less than three seconds.
And the rings don't make you "slightly" better. lol They take already boss abilities and ramp them up by a pretty serious degree.
Seriously, with just the Ring of the Erudite you'l almost never run out of magica.
And the different variations of the Vampires attack capabilities makes Vampires much more deadly than a Dawnguard member IMO.
