castrandom benefits most from haste but it isn't the way to do the most dps
No one said castrandom is the way to do the most dps. Not many here will watch their cast bar on their shamans and use priority system for maximizing dps while AT THE SAME TIME tanking the boss. It's just too much micro managing going on. With that said, /castrandom sure makes it real easy to do pretty good dps. My shaman routinely top DPS meters on PUG(wooowooo I know, but its something) raids where I am too lazy to prioritize my casting. Still haste is going to benefit /castrandom users almost exactly as the numbers I posted earlier. I can't believe we are even arguing how haste helps any cast sequence.