I have an ice/storm controller. I like the combo for thematic reasons. When I finally was able to take Tornado I was bummed. I have seen so many times where people lambaste people for using powers with knockback.
With that, why would you take Tornado? In a group setting I would never use it unless maybe as a Hail Mary after half the team has died. As is, ice/storm is pitiful at soloing so it is really team dependent in my opinion.
I know lightning storm has knockback but it is a single target and not a chaotic group mess.
I tried searching for a topic about my question but could not weed through all the posts returned. It’s probably been ask before.