Mucinex is in my system full time. If you have normally viscous mucus or no mucus (known as dry bronchiectasis) there is probably no need to use it.
I don't use albuterol, the Symbicort replaces it with a long-acting beta-agonist (LABA). Albuterol is a short-acting med (SABA.) I use Symbicort, 2 puffs, twice a day, morning and evening. I only use levalbuterol nebs if I am having a severe asthma attack or and exacerbation (respiratory illness.)
After I use Symbicort, I go about my morning routine, then do with saline or with exercise, followed by airway clearance with the Aerobika.

Reminder - this is what works for me, we are all different and need a routine that works for us. Also, I don't (as far as I know) have MAC right now. If I begin to feel the least bit ill I immediately switch to saline and airway clearance daily or even twice daily, along with the med regimen I worked out with my pulmo for my lungs.

This is why MAC and Bronchiectasis are so frustrating to treat - they are as variable from one person to another as food preferences or artistic talent!

Also, do some reading about dry bronchiectasis. It is important to do airway clearance, but to not be obsessed by trying to bring up sputum that isn't there.

Sue