I am struggling with a colleague who seems to think she is the only person in the team that can do anything, and I feel constantly trampled on, and that I have no role or purpose within the team. Every idea or process I put together even when it does not encompass her remit, she always makes a play for by saying I can check that with xyz. I don't know whether it is self importance or what but it is so frustrating, and I get so upset by it. After an incident last week I tried explaining it by email and was very careful to not be pointing the finger, but explained the importance of empowering the team etc (I did make our boss aware just to cover myself) but it just doesn't seem to go in at all. Some of the task she tasks on I would say aren't necessarily in her remit and some below her paygrade. Does anyone have any strategies for dealing with this type of thing..?