It is possible to have 3 sub houses to be allies. I got fremen, ix and sadaukar. I really hate tlelaxu. AT the start (campaign) of the game, a group of tleilaxu attackedmy defenseless base. The leeches do *some* damage but the contaminators... Personally, here is what I think of the subhouses: Ix: Good at cloning, but it really depends on what units u clone. Fremen: A VERY good subhouse.their stealthed. Tleilaxu: sure, they infect our harvesters but if the tleilaxu attacks a base by running into the defenses (wall, turrets) they'll perish. Guild: hmm.. I rarely use the guild. I think they are exspensive. MY tactic is to teleport them to a place (Behind the enemy withou tthem knowing) and let the regenerate. Sadaukar: Their machinegun is almost good at everything. I rushed them with buzzsaws and flame tanks...