He has uncountable techniques in that book, not to mention being totally smart when using them, outsmarting even Hisoka himself, which I didn't think I'd live to see. Kuroro has an extreme wit and smartness, maybe only matched by Meruem.
I liked how Kuroro prepared everuthing so he'd be sure he'd defeat Hisoka. He stated the chances of his victory are of 100%. You should reread the fight SSJ2. That fight was pretty cool, despite the walls of text and Kuroro's ass designer.
Kuroro is the type of badass character I really like, not the one like Zoro [and maybe Guts] whom are made to be badass... he is badass in his own and discret way, and the character doesn't force his badassery through our throats with supposed badass lines like "You can't even kill my boredom", "Because I am stronger than you". He doesn't force is, he just is.