Dark Convergence has a good purpose to fight big groups, but is too easy to use. It is really annoying to have it everywhere and have to break free on cooldown, but at least when there is no lag it is survivable. When big group is around and the lag becomes a big factor this set becomes an insta-kill. By the time your game client shows you that you're pulled, you are already seconds into it on server. I have "pull and insta-dead" situations a lot. Even when I understand on time I got pulled, I die on the third break-free attempt. In this situation, blocking does not work, because your break-free didn't work. The upcoming changes to this set, will mostly buff it in lag (it will pull more players and damage them more per target).
I really think this set should not be in the game. It kills diversity. Why do we need a ton of CC abilities in classes that require you to go in melee range to apply them (most of them single target), when you can have this set and spam AOEs around from a distance? It requires no skill or timing (unlike a good bombing for example) ... just throw AOE ... any AOE ... lag and the set will take care of the rest.