Is it even worth using the Cyclone rune (Sweeping Wind) anywhere other than Act 3? It seems like in almost all of the more open areas, due to the drastically lower monster density that SW is always falling off. I'll even punch barrels, bone piles etc., but it doesn't matter. It's not so much an issue building up a three stack from scratch either, because I can do it around 3s on average, but the spirit cost of having to constantly cast it. On anything but Act 3 I've just been using the first rune that makes it stay out for 20s, but it seems like such a waste of potential.
On elites Cyclone would still be superior, but for everything else, what's the point of constantly having to rebuild a stack just to get the possibility of a vortex proc right before an enemy is about to die anyway?