These boyos cast a Root, a Snare, Annul Magic, Retrogression, and I want to say Dooming Darkness, Ignite Blood, something very simliar to spell description of Deflux--will verify and correct.
Might be another DoT I'm missing--seem like they're gifted with Necro spells but no pet. For the most part, I can resist everything other than Ignite Blood and the Deflux. Occassionally I'll get hit w/a snare or root but they break pretty quick.
Not to be trifled with if you have low resists.