Hi! I like using elements of IFS with myself and others. Essentially managers and firefighters aim to regulate us because those parts believe that you do not have the emotional capacity to experience the basement/exiled parts.
So it is a nice way for us to be able to understand the intentions of our actions. Eg if I am always trying to stay one step ahead, worry and plan, that is my manager planning part. She is trying to evade feeling overwhelmed, judgemental or sad. The overwhelm and judgement are likely caused by my own wounded false beliefs. The sadness might be an existential part of life. Regardless both feel like threats to my subconscious survival brain that just wants to get through the day.
So I will question - ‘what are you scared of happening’, ‘what is your purpose’ ‘what do you believe’ ‘why do you believe that’ etc.
Firefighters come in when managers can’t do their job - maybe there is too much overwhelm. This can look like depression, overeating, binging on tv etc.
Both parts are protective. And on a neurophysiological level, highly prevalent manager parts lead to of floods of stress related neurochemicals that sensitise the central nervous system. As well as being a reflexive protective strategy.
Whereas firefighters seem to occur on the back end of that - there is too much stress and managers don’t have the resources to get through it - retreat!
Generally it can be helpful to think of stress as fear. We are really trying to avoid feeling inadequate, powerless and disconnected. And there is an early conditioning that feeling and expressing deep anger/sadness/helplessness over others will lead to these things. We need connection and a feeling of power and adequacy to stay attached.
Hope that helps!