User blog comment:Kevo411/OP Nen Abilities?/@comment-14902757-20150610012752

Rabid Dog + Shizuku - Rabid dog opens multiple wounds, Shizuku sucks the blood out of the enemy. As with most combinations, the abilities are OP but the owners are weak.

Owl - I don't know how tiny his Fun fun cloth could go but let's say he can go smaller than a mustard seed, he can shrink a car inside and drop it to someone else's food. By the time the food is consumed, he can undo his fun fun cloth and the person no matter how strong would die because of the effect.

Feitan + Biscuit - Biscuit would beat up Feitan down to a point where Pain Packer is maximized. Biscuit would hide and Fei unleashes the product of that Pain packer. Maybe he can produce a Sun 10x bigger than the one he used to obliterate Zazan.. After that, Biscuit performs piano massage to heal Fei's body.

Basho - a perfect haiku.

I think almost all abilities are OP as long as the opponent is human.. Most abilities are fatal even against Uvo as long as the situation is perfect for a given technique. But even these OP power combinations could still lose if the battles are done inside a cage or ring because of the opponent's awareness of possible attacks.