Maybe I'm not understanding how dot's work in this game, but fracture just doesn't seem worth casting at all. 100 potency attack with a 20 potency dot? Does the 20 potency mean 20 potency per dot tick? It's a 15 second dot which gives it a potency of 200 overall right?

Or is it only a 180 potency attack because you actually only get 4 ticks of the dot minus the initial hit? The dot does damage every 3 seconds correct?

Someone please enlighten me.

Thanks!