This is a tough question because the two disciplines require very different tools, ideally. The Prophet 100s are a balla big mountain ski. I think you could ride pipe with them, but they are not the best tool for it. Unlike the Prophet 130s referenced (the Jibij guy uses them for pipe and claims they give the best boost of any skis made), which are really soft, the 100s are stiff (but damp).
I love my 100s, though (and additionally my 130s), and definitely recommend them for anyone interested.