Board Thread:Questions and Answers/@comment-26005711-20151226104253/@comment-73.215.54.7-20170622180659

It's hard to say. In terms of strength, I have no clue, but I'm inclined to say that both Illumi and Hisoka are at about the same level. I say this because Hisoka  questioned whether he should kill Killua to earn Illumi's wrath and presumably fight him. Hisoka really only fights people who are as strong or stronger than him. But Hisoka seems to be more cunning than Illumi. Illumi does decieve and control people, but he doesn't rely on actual intelligence or cleverness to defeat someone (from my subjective observation.) So hypothetically speaking, if they were to start fighting, regardless of strength, it would be a tough fight, and Hisoka might have the upper hand due to his cleverness and strength.