Its probably the strongest set in the game, for PVP at least and I can see if even more wanted in 1.6 if the set is unchanged. If it has a CD, its probably intended.
As far as I know, the CD basically ends when the buff provided by the set wears off. So you can't stack it, but (enough incoming hits provided) keep it up all the time. At least that's how I think it works now on PTS. my char is not copied...
Lairgren | DC Dragonknight - August Palatine
playing for eXile