Help with Cyclone CoC Ice Nova

So im looking for some help to figure out why my singel dps is not that good..

Here is a POB link: https://pastebin.com/eFb6qT0t
What can i do to get more single target?
Or what am i doing wrong?

Thanks in advance for any tips and help.

Hello!

In the Pob you linked you do not use frostbolt!