Anyone on both Nucala and Xolair?

New to this group so thank you in advance. I have asthma, ABPA and have had MAC. Xolair has helped the past 6 years but I haven't been able to taper down on prednisone ( 15 mgs ) . My pulmonologist suggests adding in Nucala. Wondering if anyone else has been on both, for what reason, and if it has made a difference. Thank you!!!