The elite Morag Tong oh so better than the Dark Brotherhood assassins and the Dragonborn...was a bit anti-climatic.

I love my new armor though.

Just Fus Ro Meow'd them with the corrupted version of it..thanks to Herma-Mora and disintegrated a couple of them after I cut them up a bit.

I have yet to run into the morag tong in dragonborn. What triggers them showing up?

A Raven Rock questline, I won't spoil what it is or the mods'll be all over me.

I'll just say you have to do it before you can obtain property in Raven Rock for an achievement.