he hard part would be a shame. Since the idea is to Path of exile currency use the tornado to suck up all the mobs above my character, I don't want to hit the tornado as it will deal too much damage and kill the junk mods without using reverse knockdown. I think ideally a skill that can explode for me (like electrode blast), or a shotgun skill with cascaded revenge would be the best way to go.
Sorry guy who posted Ngahamu's flame with revenge stunt as soon as I deleted the post, sounds like an interesting concept.
Of I've spilled this tournament so many, all kinds of different flavors.
One of the neatest is a vacuum to pull all mobs in, then a hellish scream + molten shell to blow them all up. It works pretty well but the latency is insane.
Here's how I did it.
There is a mastery skill that gives 5% attack speed to POE currency buy each mob at close range, with it we can hit 100 attacks per second with minimal investment in attack speed.