Hum Idk who told you chaos reach was supposed to be a boss killer but ive never seen it do that / avdertized as such. Its obviously a elite /miniboss / add clear super. Like most arc supers in the game to be honest. Even thundercrash isnt really a boss killer but more of a ultra/elite group killer Only cuirass of the falling star turns thundercrash into an anti boss option. And so does geomags and stareater scales.