Board Thread:Questions and Answers/@comment-6576725-20180211015533/@comment-48285-20180212033802

I'd say they would have to go all out if they went up against Pouf or Youpi, since even Morel, who was a more experienced Nen user, had to go all out. That said, I don't think Hisoka would go all out. He'd want to keep the game going and it might even be his downfall. My guess is he'd probably take on Pouf and leave Youpi to Illumi, since I don't really see them fighting together.

Illumi would probably be in more trouble than Hisoka, if he's taking on Youpi. His needles may put him at an advantage distance-wise, but that might put Youpi over the edge and transform his body due to rage. That could quickly turn the tables on the fight, as Youpi could fire laser beams at Illumi, forcing him to close the distance. I doubt that Illumi could actually control Youpi as one of his Needlemen because I think Youpi's bulk would stop the needle.

Those are just my thoughts, though.