The Lightning Fate in Coerthas against the Clockwork, anyone feel like this guy is supremely broken?

He uses Stoneskin not 10 secs after you break the one he currently has. Im a tank so i dont know if we can remove the buff by skills but you cant stun him or silence him.

He basically gives himself 10% more HP every time he uses Stoneskin ._.

edit: bah, unfinished thread title, :|