That is tough. Chrollo may be able to beat the grandfather but not the father and grandfather at the same time. Hisoka showed dominance over Illuma but Illuma could kill 3-4 Spiders before Hisoka could stop him(maybe). The little sister(brother I heard idk) that joined the spiders has admitted they're above her. Killua could definitely handle his own against a couple of them(Frankenstein, Vacuum girl, Pakkunada(nose girl) and maybe the cell phone guy) Feitang would be the biggest threat along with Nobunaga. We don't know much about the fat brother but he doesn't seem intimidating but he's still a Zoldyck which means he's good at killing somehow. Idk about the girl and the mom I've never seen anything from them.
The spiders I'm positive would die in this fight are: the mummy, the wire girl, the vacuum girl, the cell phone guy, Uvo, Frankenstein, the clone girl and the nose girl. Killua may be able to take down Nobunaga or Finks now idk.
Zoldycks that would die: Everyone besides Illuma and the father.
I'd have to say the Phantom Troupe wins.
I TOTALLY disagree with you. First of all, the cellphone guy has that 'super saiyan' mode of his when he sticks a needle into himself, his overal stats (speed, reflexes, strength, force, skill, and aggression) increase dramatically when he gets into that form and more importantly, the computer controlling him in that form won't stop until he has eliminated his target.
So while there is no proof that he is faster than Killua when he enters that mode, there is equally no proof that Killua himself is faster than he is when Killua is in kanmaru mode.
Also, even though Killua's reflexes are automatic in that mode, you must remember that the cellphone guy's reflexes are also automated when he is in that form as he is under the control of a computer program. So no, no way Killua kills Franklin and that guy when they gang up on him and there is no proof that he even beats cellphone guy one on one. We also don't know how fast Franklin's nen bullets are compared to Killua's speed, for all we know that guy's got incredibly fast bullets and inhumane aim (it is his field of expertise after all).
As for Bonolenov (mummy guy), I think you totally failed to comprehend his abilities. Take note of the fact that his opponent in the chimera ant arc was a known speedster, and bonolenov blitzed said speedster with ease when he entered his battle cantarbille mode (tiki mask and spear mode). Bonolenov's attack "Jupiter" and he himself in battle cantarbille mode move at the speed of sound, he even said so when the guy was tryna run away from him, that he couldn't outrun sound no matter how fast he ran.
So no, I think you are severely underestimating that phantom troupe and that your analysis is way off.
I agree that vacuum girl is incredibly weak, and I aint seen enough from kortopi to rate him at all, though I think he is probably also weak.
Another guy that people typically forget to mention is Ubogin, I bet he would give Killua's dad a tough time. Alot of people seem to underate him coz of how he lost to Kurapika but people forget that Kurapika's abilities were made to deal specifically with the troupe. That guy is freakishly strong and I don't get why people think that Gon's janken is anywhere near the level of Ubo's big bang.