Quote Originally Posted by Cinge View Post
So if you cast thunder II and a thundercloud procs, you can hit Thunder I, II or III and they will all do the same damage. There's no "bonus". Is using Thunder III for procs, putting up Thunder III's dot(instead of re-applying Thunder II's) and then that turns all future Thundercloud procs into the 345 potency instead of 295, until you hard cast thunder II again?

I'm not seeing the benefit of losing 50 potency per cloud proc for .5 seconds of cast time(outside situations with tons of movement).
I think the argument about the time was more about time spent sitting at full MP, and not spamming fire, than it was about movement. But I have only seen conjecture, no math yet, but it seems possible that getting back to fire spam .5 sec quicker might be better than a few more tics and a more frequent/potent proc.