why is ice nova so strong on boxes but so weak for us

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Rimez wrote:

I make it a habit to always have a smoke mine in my wep swap for ice nova boxes, spam detonate the second you click the box to get some distance on nova/explosion/detonate dead.

But also, why do people think the player ice nova is so weak? My ice nova witch with double divinarius and carcass jack oneshots the screen in maps with 0 setup, clears way faster than my discharger who has to curse and enduring cry and tank and then discharge and let the prolif do work, while the witch just holds down lightning warp through the map (that freezes thanks to herald of ice) while dropping novas that erase entire zip codes.