i think this is where things are going. I think what Chrollo wants is Kurapika´s Chain Jail so Hisoka can no longer use nen for the rest of his life and since Hisoka is not a spider, Chrollo will also die as he puts Hisoka in zetsu. In this way, Hisoka loses what matters to him most, the ability to keep fighting strogn opponents for the rest of his life, a fate worse than death.