Now as you said you have stopped all medications, this is good.
Now you have some options. For nebulization use any one.
Either use only ventolin with clenil A nebulization twice a day.
Either use Clenil C not clenil A nebulization twice a day.
Either use only ventolin twice a day.
Now for oral medications. Again also for oral, use only one.
Either use only myteka.
Either use only zatofen syp.
Now in my opinion zatofen syp, seems more suited to your childs description as its looking like allergic condition. But myteka is ok.
For Nebulization I would prefer clenil c as it contains both the medications for nebulization, so makes your life easier. Again my opinion if you are satisfied with ventolin and clenil A or even ventolin only its also ok.
Ventolin via inhaled route, long term does not have any major side effects.
Try to find natural raw honey from somewhere it's really beneficial for allergies and infections. It contains a portion of wax. If someone lives in the US or UK he can order it from amazon, they also deliver to pakistan, but then it would be quite expensive reaching here, following is a link from amazon US as an example.
Amazon.com : Y.S. Eco Bee Farms Raw Honey - 22 oz : Grocery & Gourmet Food