Here's my first wave 30 after slapping the build together, theres a lot of changes to come, but the initial testing seems pretty good!
Some problems to adress:
Need more damage (PoB shows 16m, I think this might be underestimating because pob doesnt factor in the returning projectile triggering CoC or the projectiles chaining off my tornado)
Need more life gain on hit, with this many projectiles the more LGOH the better
Ice Spear clear seems bad on dense waves, but maybe more damage would fix this problem too
https://youtu.be/iYi2DFBfjSc
https://pastebin.com/57DtNxfH
*Warning this build seems to destroy my FPS while recording, so sorry for the bad quality.*