I can manage to get to the first felhunters phase and after they are popping out, everything starts to mess up and simply I wipe. I don't know what to do, to be honest. I use everything: CDs, doomguard, embers after the impfest, being demo with switching to DA and I still can't push over them.
I know Kanrethad is supposed to be hard, but I didn't really have any problems with whole scenario until felhunters and I'm getting crazy with that phase.