To establish which muscle mass gainer is the most suitable for you, you must first establish the number of calories you need on a daily basis, as well as the amount of carbohydrates, fats and proteins. In this way, it will be much easier for you to know which type of gainer is the most suitable for you.
A good option is to create your own muscle mass gainer supplement, that way you can prepare a shake balancing the amounts of macronutrients you need. To create it, you can choose a protein source or mix several different ones together.
In this way, you can include your weight gainer in your daily supplement routine, as you do with: creatine, glutamine, post-workout products or minerals and other nutrients.