Pleasure for Slaneesh, blood for Khorne and goodness knows what for Tzeentch and Nurgle.
One does not summon
a Tzeentchian deamon: you must mearly get its attention.
As for Nurgal: great quantitys of befouled substances would be the norm, I think.
Edit: My guys are here to kill things and get off on it. As long as they are still alive and the more importaint experiments are still working, it counts as a win to us.