I can hit nair to upsmash when I get the weak hit of nair, and I know how to get the weak hit of nair, but what I struggle at a lot, is actually finding a weak hit nair in neutral. When I watch top foxes they seem to just full hop over arials and comedown fast falling, but I normally end up getting hit or trading with strong hit and pushing them outside the confirm%. What should I look for before trying to punish with a weak hit nair.