I enjoy their fight though it took me some time to undetstand Chrollo's abilities. I like that Chrollo is not out there to prove his worth or show to the readers that he's the strongest. He fights to kill Hisoka because Hisoka has been very persistent. He fights with "hit and run" tactic. It's very consistent to his character. A thief who as much as possible evades fights or possible losses. That's why he's prepared for this and opted to fight in a battle arena with lots of audiences coz it'd be to his advantage.