First of all you have to eat FOOD to gain size, with out food your not going to gain anything, also what is your diet like, are you having 6-8 meals? meeting your macros? do you know what kinda foods you should be eating and when? once you have those all down than worry about your training, than supps. As for your supps NO MUSCLE TECH, its just a shitty company, overpriced and a BS company. If you read anywhere in the supp section, MuscleTech is hated. here are some suggestions:
Protein-BSN
Syntha-6(it has 3 diff proteins, including whey(fast digesting) and
casein(slow digesting,making it a perfect protein to take before bed). Another good choice is ON
100% Whey.
Creatine-Instead of CellTech, you should look into just some regular creatine mono, you will see better results check out AST or Dymatize, both good trusted brands.
Another product you could look into is a glutamine, just to speed your recovery,enhance ATP,increase cell volumization,reduces muscle breakdown,reduces fatigue and lactic acid levels giving you better more productive workouts. But it isnt necessary, just a suggestion.