As a matter of fact, research has shown that a beverage containing both carbs and whey will improve time to exhaustion, performance, as well as recovery.
You should train legs and glutes 2x per week, with a misc of heavy lifting and metabolica training ( low+high reps)... just like anything else. But more importantly, you need to eat.
To be honest, that training plan is far from optimal. You need more less volume, and , for cutting, i'd like to see a client hit each bodypart at least once every 5 days, with lowered volume