I dont know whether your system is set up in a way that will enable you to not be united, and stay the way you are. only you can say that.

by control do you mean have more time in control of the body /time out in the world.

or

do you mean to have a better/less stressful/less painful life?

if you mean control as in who comes out when and have more time in control of the body only you know whether your system is set up in a way that allows the alters to be in control longer or not. everyones system is different and made up in what ever ways that is best for that system to survive. Since you know about the others in your system maybe you can talk inside with them to find out how your system is made up and how you each end up in control /out in the world. maybe you can hold meetings where you all can make decisions on who needs to be out when.

if by control you mean you want your life to be better/less stressful well that takes working with a mental health treatment provider called a therapist or a psychiatrist. they can help you learn coping tools that you can use to make your life better/less stressful...