Severe Asthma

I'm 30 w/ severe asthma - I take Advair, Zyflo, Zrytec, Sprivia, Prednisone, Albuterol/Atrovent (DuoNeb), Allergy Shots (weekly) Ativan and I am waiting on my first injection of Xolair. In the last 2yrs, I have been in ICU & CCU for extended periods. I have now been placed on Oxygen Therapy at home for good. I also have tracheal stenosis b/c of having a trachae when I was 2; this does NOT help my asthma. If the Xolair shot does not work, my asthma and pulmo doctors both say I will have to continue on Prednisone for the rest of my life. I DO NOT like what the steroids do to my body, but the only way to have my airways open is to be on Prednisone. Is there any other meds I should know about that will help?