First off both fremen and sadukar are good. Now what rellay matters is the skill of the players. Also what house are you playing with and what other sub house do you have. My personal preferance though is fremen. With a group of 5 to 10 Fedykin I was able to destroy most of the harks defense in attaking there stronghold on Dune. I do relize that that was the Ai but still. Also try Sadukar and Fremen that is a very interesting combo.