Michael,
I keep my pietschmanni at around the mid to upper 70's during the day and dropping to the mid to upper 60's at night. The humidity is around 70%-80% during the day and then rising to close to 100% at night. I have contacted Bill Love and he says that they come from the same forests North East of Tana(captitol or madagascar) that both sikorae and phantasticus live in. The reason that I keep mine at a little higher tempretures than both these species are kept is that Neil Meister said that they seemed to do better when kept at slightly higher temps. But its your call the the majority of people i have contacted, Gecko King, Geckos by Brad, Intense Herpoculture, Reptile Depot, and Aquariumstuffers all said that they do fine when kept like sikorae.
Hope this helps,
-Matt