I enclosed my suggestions (just suggestions BTW) for rooting and growing but I
didn't mention temps. As for most Nepenthes, it seems to me that 60F is a safe
low. Any lower temps and you may risk some damage. High humidity will offer
some protection from cool temps, but not much.
Last note - I am assuming that everyone must have heard something about the
fungus that lives in sphagnum moss. Wear gloves when handling the moss with
your cutting.
Tom in Fl