[FaeLenx]

It's more or less a punishing tool to fight against people who are running away to regen/delay their own CDs. It isn't meant to be utilized as a main battle strategy as much as it is a little trick in a bag of tricks you might pull out once in a while to make yourself incredibly dangerous. If it's a PvE fight you use it in, an AoE of that strength will clear just about anything. In PVP, hitting someone for that much damage that is unavoidable can end a fight.

And just like a lot of skills in a lot of classes, this one doesn't need to be taken if it doesn't work for you. One thing to remember is that the duration isn't actually that large, and a cleanse potion/having high focus to begin with can make it that much more easy to mitigate.