I would suggest having a proper portion of fats, proteins, and carbohydrates in each meal. If one meal is just protein and fat, what if your protein source and fat source are not complete proteins? Maybe the two you've chosen will complete each other, maybe not. It would be best to include all three macronutrients into a proper portion size meal. Is it best to have all your protein in 2/5 meals? Will it all of it be absorbed? Is all of it needed? How much will be utilized? How much will be stored as body fat? (Same goes with all the other two macronutrients)
The pre-workout meal should be similar to the "ideal meal" (25-30% protein) (50-55% carbohydrate) (20% fat) consisting of complex carbohydrates, some fats, and whole food proteins. Food (complex carbohydrates, ideal meals) takes up to three hours to fully digest. At that point is when I would recommend working out. Otherwise you risk gastrointestinal distress, as prior to the three hour mark, blood is circulating around the organs, digesting the food. When training commences, blood is drawn from the organs into the muscles. A carbohydrate/protein powder mix is not recommended prior to working out as the simple carbohydrates will create an insulin spike. An insulin spike prior to working out will significantly decrease the preceding GH response during and after training. When you eat insulin rises and your body enters a state of Hyperglycemia, where high insulin levels will inhibit growth hormone. Further, consumption of simple carbohydrates prior to working out or at any time will inevitable cause a crash, or a state known as Hypoglycemia. Entering a training workout in a state of Hypoglycemia will present many risks. There will be little amounts of available blood glucose for energy since the insulin increase from the simple carbohydrates has moved the majority of available glucose into the muscles or other energy depots. In a Hypoglycemia state, the blood glucose is already in the muscles and the exercised induced muscles demand glucose as well. This will present dangerously low glucose levels in the body which can lead to decreased motivation, nausea, dizziness, etc.