im pretty shure i have a devils ivy [potho]
i take cuttings all the time, you can cut em as far back as you want,
i stick mine in a glass of water, just make shure it has atleast two node in water and one out. i cut the leaves off too, some times ill leave a leaf on the out of water nod. it takes time but its always worked for me.
you can see a pic of it in my devils ivy/phildroden thred