prednisone alone for flares is not enough - it will hide the symptoms but not address the problem. Rituxan should help bring you into remission - but your best bet is to consult with one of the vasculitis experts, and have your doc coordinate care in consultation with them. For tracheal stenosis specifically, Dr Robert Lebovics in NYC has years of experience with surgery for GPA patients and you might try to check with him as well.

Good luck.