User blog comment:Bennlimos/The Five Great Calamities Versus Nen Users/@comment-10528819-20150608130151

Chrollo vs Brion: Brion is a weapon, and we don't even know if he's a living thing, so he's probably determined, he wouldn't give up even if he's pretty much dead already, besides that he's probably really destructive, since he's a calamity, so the best way to defeat him would be stunning him to death, and Chrollo has a strong arsenal of stuning abilitys, from the inddor fish to the fun fun cloth fighting him must be annoying

Geru vs Ai: Ai is a gas life-form thata makes people insane, AKA a living drug, and Gaeru is not only a "snake" as she's a powerfull poison hunter, so she probably has experience in poison and getting them in a non-controlable enviroment

Zeno vs Hellbell: as a snake hellbell's ace is probably some type of poison, also beeing able to have powerfull teths and beeing fast, Zeno is really fast and is a really strong nen user, but more than that he's a Zoldyck, therefor he's immune to poison

Kite vs Papu: Papu stongest gadget would be that he's hard to find and kill his preys on the shadow, Kite ability gives him a lot of strong moves that don't need to aim

Morel/ Cheadle vs Zombae Disease: Morel could create smoke puppets to scout donw the area and use his inhuman lumbs to not breath the disease and not be contagious by it, my only doubt is if Zombae is contageos by other ways than breathing. For Cheadle, Zombae is a disease and the best way to beat it is not getting it (durp) and Cheadle is a triple star virus hunter, she probably knows how to avoid it