I find trollgore gives me more grief at the moment than anything. I skip novus, im just up for that much of a headache again after my first 20 or so attempts trying to kill him. He was bad enough on normal. The other 2 bosses are easy enough ive found. Ive never really had any issues with tharonja, But i always keep 4 healing stream down so thats probably why ive never noticed the puddle.

Edit: I just noticed hachoo that you have a deathknight as your main, So im guessing once novus becomes targettable you just drop anti-magic zone on top of all of them and burn him down?