Actually, the clock is part of the mob - so basically it is.
I will admit that some of these bosses are a pain - me and my group wiped 4 times on the Taral V end boss and around 4-5 times on the madman with implants inside Maelstrom Prison.
I had assumed I was doing something wrong because my last group I ran with was amazing - I examined my fellow players gear and
Only one of them (My tank friend) actually had 50 epics set in. It completely explained why it was so difficult.
You must be geared for these runs, or else you will die