I use my Seretide inhaler twice a day and just carry a bricanyl inhaler as an emergency one while I am out. This works well for me and has done for the past 10+ yrs. I find the powder one which does not blast the medicine into the back of your throat is a big advantage.
If I am ill and strugling with my breathing I can take 2 doses twice s day to keep it under control. I hope that helps.