I'm not sure about your Nazgul side. Some aim for burden, some for threat... I'd straight it up! :^)
I dont have any nazguls for corruptin, Cantea is for crowd contro and Otsea is for drawing cards, think those must have been the ones you thought of?
And cant find any nazguls tha tdoes something ese that is better than what these fellals do.
And like Draino said, grima is a bit of an issue, and so is massive possession hate(like Grond+besiegers can be an issue, big chance of a coupe of minions left in regroup for them)
another thing I struggle with is swarm bombs, tentacles and evilmen maneuver fellas, all are decks Ive been very close to losing against or have lost against.
Any ideas for anti-swarm?(thinking of pulling 1 knight armor for 1 tripple overwhelm armor for isildur) other than that I only have my defender-events and bow coupled with 5-7companions on the field, usually not enough against a decent swarm.